90365290657 has 4 divisors (see below), whose sum is σ = 91242623680. Its totient is φ = 89487957636.

The previous prime is 90365290637. The next prime is 90365290699. The reversal of 90365290657 is 75609256309.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75609256309 = 1867 ⋅40497727.

It is a cyclic number.

It is not a de Polignac number, because 90365290657 - 2²³ = 90356902049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90365290607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438666357 + ... + 438666562.

It is an arithmetic number, because the mean of its divisors is an integer number (22810655920).

Almost surely, 2^90365290657 is an apocalyptic number.

It is an amenable number.

90365290657 is a deficient number, since it is larger than the sum of its proper divisors (877333023).

90365290657 is a wasteful number, since it uses less digits than its factorization.

90365290657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877333022.

The product of its (nonzero) digits is 3061800, while the sum is 52.

The spelling of 90365290657 in words is "ninety billion, three hundred sixty-five million, two hundred ninety thousand, six hundred fifty-seven".