31547394868 has 48 divisors (see below), whose sum is σ = 60870426624. Its totient is φ = 14187126240.

The previous prime is 31547394847. The next prime is 31547394871. The reversal of 31547394868 is 86849374513.

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, 2043105 + ... + 2058487.

It is an arithmetic number, because the mean of its divisors is an integer number (1268133888).

Almost surely, 2^31547394868 is an apocalyptic number.

It is an amenable number.

31547394868 is a deficient number, since it is larger than the sum of its proper divisors (29323031756).

31547394868 is a wasteful number, since it uses less digits than its factorization.

31547394868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15892 (or 15890 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 58.

The spelling of 31547394868 in words is "thirty-one billion, five hundred forty-seven million, three hundred ninety-four thousand, eight hundred sixty-eight".