1165320000 has 560 divisors, whose sum is σ = 4665756480. Its totient is φ = 283392000.

The previous prime is 1165319993. The next prime is 1165320041. The reversal of 1165320000 is 235611.

1165320000 is a `hidden beast` number, since 11 + 653 + 2 + 0 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 14039959 + ... + 14040041.

It is an arithmetic number, because the mean of its divisors is an integer number (8331708).

Almost surely, 2^1165320000 is an apocalyptic number.

1165320000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1165320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2332878240).

1165320000 is an abundant number, since it is smaller than the sum of its proper divisors (3500436480).

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

1165320000 is an equidigital number, since it uses as much as digits as its factorization.

1165320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1165320000 is about 34136.7836797786. The cubic root of 1165320000 is about 1052.3213945703.

Adding to 1165320000 its reverse (235611), we get a palindrome (1165555611).

The spelling of 1165320000 in words is "one billion, one hundred sixty-five million, three hundred twenty thousand".