90421170796625 has 16 divisors (see below), whose sum is σ = 112954231153920. Its totient is φ = 72267314842800.

The previous prime is 90421170796601. The next prime is 90421170796751. The reversal of 90421170796625 is 52669707112409.

It is a happy number.

It is not a de Polignac number, because 90421170796625 - 2²⁸ = 90420902361169 is a prime.

It is a super-2 number, since 2×90421170796625² (a number of 29 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 347978579 + ... + 348238328.

It is an arithmetic number, because the mean of its divisors is an integer number (7059639447120).

Almost surely, 2^{90421170796625} is an apocalyptic number.

It is an amenable number.

90421170796625 is a deficient number, since it is larger than the sum of its proper divisors (22533060357295).

90421170796625 is a wasteful number, since it uses less digits than its factorization.

90421170796625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696217961 (or 696217951 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 90421170796625 in words is "ninety trillion, four hundred twenty-one billion, one hundred seventy million, seven hundred ninety-six thousand, six hundred twenty-five".