31878553004 has 12 divisors (see below), whose sum is σ = 55806016728. Its totient is φ = 15933976800.

The previous prime is 31878552991. The next prime is 31878553037. The reversal of 31878553004 is 40035587813.

It is a happy number.

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, 1311377 + ... + 1335464.

It is an arithmetic number, because the mean of its divisors is an integer number (4650501394).

Almost surely, 2^31878553004 is an apocalyptic number.

It is an amenable number.

31878553004 is a deficient number, since it is larger than the sum of its proper divisors (23927463724).

31878553004 is a wasteful number, since it uses less digits than its factorization.

31878553004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649856 (or 2649854 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 31878553004 in words is "thirty-one billion, eight hundred seventy-eight million, five hundred fifty-three thousand, four".