31261782968 has 32 divisors (see below), whose sum is σ = 63737637600. Its totient is φ = 14288427648.

The previous prime is 31261782949. The next prime is 31261782971. The reversal of 31261782968 is 86928716213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1448483 + ... + 1469906.

It is an arithmetic number, because the mean of its divisors is an integer number (1991801175).

Almost surely, 2^31261782968 is an apocalyptic number.

It is an amenable number.

31261782968 is an abundant number, since it is smaller than the sum of its proper divisors (32475854632).

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

31261782968 is a wasteful number, since it uses less digits than its factorization.

31261782968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918511 (or 2918507 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 53.

The spelling of 31261782968 in words is "thirty-one billion, two hundred sixty-one million, seven hundred eighty-two thousand, nine hundred sixty-eight".