90566172765 has 32 divisors (see below), whose sum is σ = 161493033600. Its totient is φ = 48156007680.

The previous prime is 90566172761. The next prime is 90566172779. The reversal of 90566172765 is 56727166509.

90566172765 is a `hidden beast` number, since 9 + 0 + 566 + 1 + 7 + 2 + 76 + 5 = 666.

It is not a de Polignac number, because 90566172765 - 2² = 90566172761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90566172761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 968700 + ... + 1058069.

It is an arithmetic number, because the mean of its divisors is an integer number (5046657300).

Almost surely, 2^90566172765 is an apocalyptic number.

It is an amenable number.

90566172765 is a deficient number, since it is larger than the sum of its proper divisors (70926860835).

90566172765 is a wasteful number, since it uses less digits than its factorization.

90566172765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027114 (or 2027108 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 54.

The spelling of 90566172765 in words is "ninety billion, five hundred sixty-six million, one hundred seventy-two thousand, seven hundred sixty-five".