31390616516 has 24 divisors (see below), whose sum is σ = 62866923840. Its totient is φ = 13434759072.

The previous prime is 31390616497. The next prime is 31390616519. The reversal of 31390616516 is 61561609313.

It is not an unprimeable number, because it can be changed into a prime (31390616519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744206 + ... + 785253.

It is an arithmetic number, because the mean of its divisors is an integer number (2619455160).

Almost surely, 2^31390616516 is an apocalyptic number.

It is an amenable number.

31390616516 is an abundant number, since it is smaller than the sum of its proper divisors (31476307324).

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

31390616516 is a wasteful number, since it uses less digits than its factorization.

31390616516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530203 (or 1530201 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 41.

The spelling of 31390616516 in words is "thirty-one billion, three hundred ninety million, six hundred sixteen thousand, five hundred sixteen".