31998055494 has 32 divisors (see below), whose sum is σ = 64176491520. Its totient is φ = 10635989472.

The previous prime is 31998055489. The next prime is 31998055501. The reversal of 31998055494 is 49455089913.

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 15 ways as a sum of consecutive naturals, for example, 5017692 + ... + 5024064.

It is an arithmetic number, because the mean of its divisors is an integer number (2005515360).

Almost surely, 2^31998055494 is an apocalyptic number.

31998055494 is an abundant number, since it is smaller than the sum of its proper divisors (32178436026).

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

31998055494 is a wasteful number, since it uses less digits than its factorization.

31998055494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8604.

The product of its (nonzero) digits is 6998400, while the sum is 57.

The spelling of 31998055494 in words is "thirty-one billion, nine hundred ninety-eight million, fifty-five thousand, four hundred ninety-four".