31626965216 has 96 divisors (see below), whose sum is σ = 77747620608. Its totient is φ = 12303498240.

The previous prime is 31626965197. The next prime is 31626965221. The reversal of 31626965216 is 61256962613.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1673516 + ... + 1692308.

It is an arithmetic number, because the mean of its divisors is an integer number (809871048).

Almost surely, 2^31626965216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31626965216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38873810304).

31626965216 is an abundant number, since it is smaller than the sum of its proper divisors (46120655392).

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

31626965216 is a wasteful number, since it uses less digits than its factorization.

31626965216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19504 (or 19496 counting only the distinct ones).

The product of its digits is 699840, while the sum is 47.

The spelling of 31626965216 in words is "thirty-one billion, six hundred twenty-six million, nine hundred sixty-five thousand, two hundred sixteen".