31463816872 has 16 divisors (see below), whose sum is σ = 59146319700. Its totient is φ = 15691464960.

The previous prime is 31463816831. The next prime is 31463816899. The reversal of 31463816872 is 27861836413.

It can be written as a sum of positive squares in 2 ways, for example, as 26220029476 + 5243787396 = 161926^2 + 72414^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5052129 + ... + 5058352.

Almost surely, 2^31463816872 is an apocalyptic number.

It is an amenable number.

31463816872 is a deficient number, since it is larger than the sum of its proper divisors (27682502828).

31463816872 is a wasteful number, since it uses less digits than its factorization.

31463816872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10110876 (or 10110872 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 49.

The spelling of 31463816872 in words is "thirty-one billion, four hundred sixty-three million, eight hundred sixteen thousand, eight hundred seventy-two".