90566172775 has 24 divisors (see below), whose sum is σ = 125111054880. Its totient is φ = 64573434240.

The previous prime is 90566172761. The next prime is 90566172779. The reversal of 90566172775 is 57727166509.

It is not a de Polignac number, because 90566172775 - 2¹¹ = 90566170727 is a prime.

It is a super-2 number, since 2×90566172775² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90566172779) 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, 4795147 + ... + 4813996.

It is an arithmetic number, because the mean of its divisors is an integer number (5212960620).

Almost surely, 2^90566172775 is an apocalyptic number.

90566172775 is a deficient number, since it is larger than the sum of its proper divisors (34544882105).

90566172775 is a wasteful number, since it uses less digits than its factorization.

90566172775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9609195 (or 9609190 counting only the distinct ones).

The product of its (nonzero) digits is 5556600, while the sum is 55.

The spelling of 90566172775 in words is "ninety billion, five hundred sixty-six million, one hundred seventy-two thousand, seven hundred seventy-five".