90715164777 has 24 divisors (see below), whose sum is σ = 136973139264. Its totient is φ = 57744528864.

The previous prime is 90715164773. The next prime is 90715164791. The reversal of 90715164777 is 77746151709.

It is a happy number.

90715164777 is a `hidden beast` number, since 90 + 71 + 5 + 16 + 477 + 7 = 666.

It is not a de Polignac number, because 90715164777 - 2² = 90715164773 is a prime.

It is a super-2 number, since 2×90715164777² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90715164773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 272658 + ... + 505739.

It is an arithmetic number, because the mean of its divisors is an integer number (5707214136).

Almost surely, 2^90715164777 is an apocalyptic number.

It is an amenable number.

90715164777 is a deficient number, since it is larger than the sum of its proper divisors (46257974487).

90715164777 is a wasteful number, since it uses less digits than its factorization.

90715164777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778989 (or 778986 counting only the distinct ones).

The product of its (nonzero) digits is 2593080, while the sum is 54.

The spelling of 90715164777 in words is "ninety billion, seven hundred fifteen million, one hundred sixty-four thousand, seven hundred seventy-seven".