31980648555 has 32 divisors (see below), whose sum is σ = 57092428800. Its totient is φ = 16984963296.

The previous prime is 31980648533. The next prime is 31980648587. The reversal of 31980648555 is 55584608913.

31980648555 is a `hidden beast` number, since 3 + 1 + 9 + 80 + 6 + 4 + 8 + 555 = 666.

It is not a de Polignac number, because 31980648555 - 2⁸ = 31980648299 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 463329 + ... + 527858.

It is an arithmetic number, because the mean of its divisors is an integer number (1784138400).

Almost surely, 2^31980648555 is an apocalyptic number.

31980648555 is a deficient number, since it is larger than the sum of its proper divisors (25111780245).

31980648555 is a wasteful number, since it uses less digits than its factorization.

31980648555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991440 (or 991434 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 54.

The spelling of 31980648555 in words is "thirty-one billion, nine hundred eighty million, six hundred forty-eight thousand, five hundred fifty-five".