64907981008590 has 32 divisors (see below), whose sum is σ = 155797596979200. Its totient is φ = 17306745762464.

The previous prime is 64907981008553. The next prime is 64907981008669. The reversal of 64907981008590 is 9580018970946.

It is a super-2 number, since 2×64907981008590² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127815690 + ... + 128322509.

It is an arithmetic number, because the mean of its divisors is an integer number (4868674905600).

Almost surely, 2^{64907981008590} is an apocalyptic number.

64907981008590 is an abundant number, since it is smaller than the sum of its proper divisors (90889615970610).

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

64907981008590 is a wasteful number, since it uses less digits than its factorization.

64907981008590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256146656.

The product of its (nonzero) digits is 39191040, while the sum is 66.

The spelling of 64907981008590 in words is "sixty-four trillion, nine hundred seven billion, nine hundred eighty-one million, eight thousand, five hundred ninety".