90520656658 has 16 divisors (see below), whose sum is σ = 139692489624. Its totient is φ = 43960734720.

The previous prime is 90520656647. The next prime is 90520656683. The reversal of 90520656658 is 85665602509.

It can be written as a sum of positive squares in 4 ways, for example, as 90406658329 + 113998329 = 300677^2 + 10677^2 .

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, 1017313 + ... + 1102708.

Almost surely, 2^90520656658 is an apocalyptic number.

90520656658 is a deficient number, since it is larger than the sum of its proper divisors (49171832966).

90520656658 is a wasteful number, since it uses less digits than its factorization.

90520656658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120637.

The product of its (nonzero) digits is 3888000, while the sum is 52.

The spelling of 90520656658 in words is "ninety billion, five hundred twenty million, six hundred fifty-six thousand, six hundred fifty-eight".