90597161640 has 32 divisors (see below), whose sum is σ = 271791485280. Its totient is φ = 24159243072.

The previous prime is 90597161623. The next prime is 90597161659. The reversal of 90597161640 is 4616179509.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 90597161640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377488054 + ... + 377488293.

It is an arithmetic number, because the mean of its divisors is an integer number (8493483915).

Almost surely, 2^90597161640 is an apocalyptic number.

It is an amenable number.

90597161640 is an abundant number, since it is smaller than the sum of its proper divisors (181194323640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90597161640 is a wasteful number, since it uses less digits than its factorization.

90597161640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754976361 (or 754976357 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 90597161640 in words is "ninety billion, five hundred ninety-seven million, one hundred sixty-one thousand, six hundred forty".