90630586521 has 12 divisors (see below), whose sum is σ = 132181827648. Its totient is φ = 59833784664.

The previous prime is 90630586513. The next prime is 90630586523. The reversal of 90630586521 is 12568503609.

90630586521 is a `hidden beast` number, since 9 + 0 + 63 + 0 + 586 + 5 + 2 + 1 = 666.

It is not a de Polignac number, because 90630586521 - 2³ = 90630586513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90630586523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48882885 + ... + 48884738.

It is an arithmetic number, because the mean of its divisors is an integer number (11015152304).

Almost surely, 2^90630586521 is an apocalyptic number.

It is an amenable number.

90630586521 is a deficient number, since it is larger than the sum of its proper divisors (41551241127).

90630586521 is a wasteful number, since it uses less digits than its factorization.

90630586521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97767732 (or 97767729 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 90630586521 in words is "ninety billion, six hundred thirty million, five hundred eighty-six thousand, five hundred twenty-one".