91577120652 has 72 divisors (see below), whose sum is σ = 233160127200. Its totient is φ = 30305237760.

The previous prime is 91577120651. The next prime is 91577120659. The reversal of 91577120652 is 25602177519.

91577120652 is a `hidden beast` number, since 9 + 1 + 577 + 1 + 20 + 6 + 52 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 91577120598 and 91577120607.

It is not an unprimeable number, because it can be changed into a prime (91577120651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15568752 + ... + 15574632.

It is an arithmetic number, because the mean of its divisors is an integer number (3238335100).

Almost surely, 2^91577120652 is an apocalyptic number.

It is an amenable number.

91577120652 is an abundant number, since it is smaller than the sum of its proper divisors (141583006548).

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

91577120652 is a wasteful number, since it uses less digits than its factorization.

91577120652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8943 (or 8938 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 45.

The spelling of 91577120652 in words is "ninety-one billion, five hundred seventy-seven million, one hundred twenty thousand, six hundred fifty-two".