31987780495 has 16 divisors (see below), whose sum is σ = 43695562752. Its totient is φ = 22252368160.

The previous prime is 31987780481. The next prime is 31987780507. The reversal of 31987780495 is 59408778913.

It is not a de Polignac number, because 31987780495 - 2¹⁷ = 31987649423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12642127 + ... + 12644656.

It is an arithmetic number, because the mean of its divisors is an integer number (2730972672).

Almost surely, 2^31987780495 is an apocalyptic number.

31987780495 is a deficient number, since it is larger than the sum of its proper divisors (11707782257).

31987780495 is a wasteful number, since it uses less digits than its factorization.

31987780495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25286822.

The product of its (nonzero) digits is 15240960, while the sum is 61.

The spelling of 31987780495 in words is "thirty-one billion, nine hundred eighty-seven million, seven hundred eighty thousand, four hundred ninety-five".