31987123008 has 28 divisors (see below), whose sum is σ = 84632596800. Its totient is φ = 10662374272.

The previous prime is 31987122977. The next prime is 31987123013. The reversal of 31987123008 is 80032178913.

It is a congruent 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, 83299608 + ... + 83299991.

Almost surely, 2^31987123008 is an apocalyptic number.

It is an amenable number.

31987123008 is an abundant number, since it is smaller than the sum of its proper divisors (52645473792).

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

31987123008 is a wasteful number, since it uses less digits than its factorization.

31987123008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166599614 (or 166599604 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 31987123008 in words is "thirty-one billion, nine hundred eighty-seven million, one hundred twenty-three thousand, eight".