31642768516 has 24 divisors (see below), whose sum is σ = 56231751744. Its totient is φ = 15577164960.

The previous prime is 31642768501. The next prime is 31642768517. The reversal of 31642768516 is 61586724613.

It is a self number, because there is not a number n which added to its sum of digits gives 31642768516.

It is not an unprimeable number, because it can be changed into a prime (31642768517) 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, 132171 + ... + 284173.

It is an arithmetic number, because the mean of its divisors is an integer number (2342989656).

Almost surely, 2^31642768516 is an apocalyptic number.

It is an amenable number.

31642768516 is a deficient number, since it is larger than the sum of its proper divisors (24588983228).

31642768516 is a wasteful number, since it uses less digits than its factorization.

31642768516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152811 (or 152809 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The spelling of 31642768516 in words is "thirty-one billion, six hundred forty-two million, seven hundred sixty-eight thousand, five hundred sixteen".