1165649996880 has 60 divisors (see below), whose sum is σ = 3914641241940. Its totient is φ = 310839998976.

The previous prime is 1165649996873. The next prime is 1165649996887. The reversal of 1165649996880 is 886999465611.

1165649996880 is a `hidden beast` number, since 1 + 1 + 6 + 56 + 499 + 9 + 6 + 8 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (1165649996873) and next prime (1165649996887).

It can be written as a sum of positive squares in 2 ways, for example, as 514226673216 + 651423323664 = 717096^2 + 807108^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 1165649996799 and 1165649996808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165649996887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 809478445 + ... + 809479884.

It is an arithmetic number, because the mean of its divisors is an integer number (65244020699).

Almost surely, 2^{1165649996880} is an apocalyptic number.

1165649996880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165649996880 is an abundant number, since it is smaller than the sum of its proper divisors (2748991245060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165649996880 is a wasteful number, since it uses less digits than its factorization.

1165649996880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618958348 (or 1618958339 counting only the distinct ones).

The product of its (nonzero) digits is 201553920, while the sum is 72.

The spelling of 1165649996880 in words is "one trillion, one hundred sixty-five billion, six hundred forty-nine million, nine hundred ninety-six thousand, eight hundred eighty".