31473872667 has 12 divisors (see below), whose sum is σ = 45499632360. Its totient is φ = 20965333248.

The previous prime is 31473872627. The next prime is 31473872669. The reversal of 31473872667 is 76627837413.

31473872667 is a `hidden beast` number, since 31 + 473 + 87 + 2 + 6 + 67 = 666.

It is not a de Polignac number, because 31473872667 - 2⁸ = 31473872411 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (31473872669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1425817 + ... + 1447722.

It is an arithmetic number, because the mean of its divisors is an integer number (3791636030).

Almost surely, 2^31473872667 is an apocalyptic number.

31473872667 is a deficient number, since it is larger than the sum of its proper divisors (14025759693).

31473872667 is a wasteful number, since it uses less digits than its factorization.

31473872667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874762 (or 2874759 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 54.

The spelling of 31473872667 in words is "thirty-one billion, four hundred seventy-three million, eight hundred seventy-two thousand, six hundred sixty-seven".