90640360587 has 32 divisors (see below), whose sum is σ = 140296126464. Its totient is φ = 50980356000.

The previous prime is 90640360583. The next prime is 90640360607. The reversal of 90640360587 is 78506304609.

It is not a de Polignac number, because 90640360587 - 2² = 90640360583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90640360583) 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, 854962 + ... + 955112.

It is an arithmetic number, because the mean of its divisors is an integer number (4384253952).

Almost surely, 2^90640360587 is an apocalyptic number.

90640360587 is a deficient number, since it is larger than the sum of its proper divisors (49655765877).

90640360587 is a wasteful number, since it uses less digits than its factorization.

90640360587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100839.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 90640360587 in words is "ninety billion, six hundred forty million, three hundred sixty thousand, five hundred eighty-seven".