1165500505650 has 96 divisors (see below), whose sum is σ = 3113232490368. Its totient is φ = 286850995200.

The previous prime is 1165500505639. The next prime is 1165500505783. The reversal of 1165500505650 is 565050055611.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1165500505599 and 1165500505608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14763082 + ... + 14841818.

It is an arithmetic number, because the mean of its divisors is an integer number (32429505108).

Almost surely, 2^{1165500505650} is an apocalyptic number.

1165500505650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1165500505650 is an abundant number, since it is smaller than the sum of its proper divisors (1947731984718).

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

1165500505650 is a wasteful number, since it uses less digits than its factorization.

1165500505650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86356 (or 86351 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 39.

The spelling of 1165500505650 in words is "one trillion, one hundred sixty-five billion, five hundred million, five hundred five thousand, six hundred fifty".