31976906872 has 8 divisors (see below), whose sum is σ = 59956700400. Its totient is φ = 15988453432.

The previous prime is 31976906851. The next prime is 31976906903. The reversal of 31976906872 is 27860967913.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×31976906872³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1998556672 + ... + 1998556687.

It is an arithmetic number, because the mean of its divisors is an integer number (7494587550).

Almost surely, 2^31976906872 is an apocalyptic number.

It is an amenable number.

31976906872 is a deficient number, since it is larger than the sum of its proper divisors (27979793528).

31976906872 is a wasteful number, since it uses less digits than its factorization.

31976906872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3997113365 (or 3997113361 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 58.

The spelling of 31976906872 in words is "thirty-one billion, nine hundred seventy-six million, nine hundred six thousand, eight hundred seventy-two".