31481573672 has 16 divisors (see below), whose sum is σ = 59061195060. Its totient is φ = 15731921664.

The previous prime is 31481573653. The next prime is 31481573719. The reversal of 31481573672 is 27637518413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30770071396 + 711502276 = 175414^2 + 26674^2 .

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, 1093043 + ... + 1121474.

Almost surely, 2^31481573672 is an apocalyptic number.

It is an amenable number.

31481573672 is a deficient number, since it is larger than the sum of its proper divisors (27579621388).

31481573672 is a wasteful number, since it uses less digits than its factorization.

31481573672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216300 (or 2216296 counting only the distinct ones).

The product of its digits is 846720, while the sum is 47.

The spelling of 31481573672 in words is "thirty-one billion, four hundred eighty-one million, five hundred seventy-three thousand, six hundred seventy-two".