31826997664 has 144 divisors (see below), whose sum is σ = 80728135488. Its totient is φ = 11999232000.

The previous prime is 31826997647. The next prime is 31826997667. The reversal of 31826997664 is 46679962813.

It is a super-2 number, since 2×31826997664² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31826997667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2361184 + ... + 2374624.

It is an arithmetic number, because the mean of its divisors is an integer number (560612052).

Almost surely, 2^31826997664 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 31826997664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40364067744).

31826997664 is an abundant number, since it is smaller than the sum of its proper divisors (48901137824).

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

31826997664 is a wasteful number, since it uses less digits than its factorization.

31826997664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13531 (or 13492 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 61.

The spelling of 31826997664 in words is "thirty-one billion, eight hundred twenty-six million, nine hundred ninety-seven thousand, six hundred sixty-four".