31977945980 has 24 divisors (see below), whose sum is σ = 67250898960. Its totient is φ = 12772661760.

The previous prime is 31977945973. The next prime is 31977946001. The reversal of 31977945980 is 8954977913.

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 in 7 ways as a sum of consecutive naturals, for example, 1143125 + ... + 1170764.

It is an arithmetic number, because the mean of its divisors is an integer number (2802120790).

Almost surely, 2^31977945980 is an apocalyptic number.

It is an amenable number.

31977945980 is an abundant number, since it is smaller than the sum of its proper divisors (35272952980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31977945980 is a wasteful number, since it uses less digits than its factorization.

31977945980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314589 (or 2314587 counting only the distinct ones).

The product of its (nonzero) digits is 17146080, while the sum is 62.

The spelling of 31977945980 in words is "thirty-one billion, nine hundred seventy-seven million, nine hundred forty-five thousand, nine hundred eighty".