89785520631 has 16 divisors (see below), whose sum is σ = 135525316320. Its totient is φ = 58727635200.

The previous prime is 89785520611. The next prime is 89785520653. The reversal of 89785520631 is 13602558798.

89785520631 is a `hidden beast` number, since 8 + 9 + 7 + 85 + 520 + 6 + 31 = 666.

It is not a de Polignac number, because 89785520631 - 2¹⁸ = 89785258487 is a prime.

It is a super-2 number, since 2×89785520631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89785520611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31370170 + ... + 31373031.

It is an arithmetic number, because the mean of its divisors is an integer number (8470332270).

Almost surely, 2^89785520631 is an apocalyptic number.

89785520631 is a deficient number, since it is larger than the sum of its proper divisors (45739795689).

89785520631 is a wasteful number, since it uses less digits than its factorization.

89785520631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62743263 (or 62743257 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 89785520631 in words is "eighty-nine billion, seven hundred eighty-five million, five hundred twenty thousand, six hundred thirty-one".