31583412872 has 128 divisors (see below), whose sum is σ = 75134822400. Its totient is φ = 12243686400.

The previous prime is 31583412859. The next prime is 31583412893. The reversal of 31583412872 is 27821438513.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 629597 + ... + 677907.

It is an arithmetic number, because the mean of its divisors is an integer number (586990800).

Almost surely, 2^31583412872 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 31583412872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37567411200).

31583412872 is an abundant number, since it is smaller than the sum of its proper divisors (43551409528).

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

31583412872 is a wasteful number, since it uses less digits than its factorization.

31583412872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48387 (or 48383 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

The spelling of 31583412872 in words is "thirty-one billion, five hundred eighty-three million, four hundred twelve thousand, eight hundred seventy-two".