90244457631 has 24 divisors (see below), whose sum is σ = 135211801296. Its totient is φ = 57958830720.

The previous prime is 90244457627. The next prime is 90244457671. The reversal of 90244457631 is 13675444209.

90244457631 is a `hidden beast` number, since 9 + 0 + 2 + 4 + 4 + 4 + 5 + 7 + 631 = 666.

It is not a de Polignac number, because 90244457631 - 2² = 90244457627 is a prime.

It is a super-2 number, since 2×90244457631² (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 (90244457671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1568940 + ... + 1625441.

It is an arithmetic number, because the mean of its divisors is an integer number (5633825054).

Almost surely, 2^90244457631 is an apocalyptic number.

90244457631 is a deficient number, since it is larger than the sum of its proper divisors (44967343665).

90244457631 is a wasteful number, since it uses less digits than its factorization.

90244457631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3194503 (or 3194500 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 90244457631 in words is "ninety billion, two hundred forty-four million, four hundred fifty-seven thousand, six hundred thirty-one".