31073532639 has 8 divisors (see below), whose sum is σ = 41841588912. Its totient is φ = 20510582400.

The previous prime is 31073532617. The next prime is 31073532641. The reversal of 31073532639 is 93623537013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31073532639 - 2²⁰ = 31072484063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31073532639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31073532689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51276154 + ... + 51276759.

It is an arithmetic number, because the mean of its divisors is an integer number (5230198614).

Almost surely, 2^31073532639 is an apocalyptic number.

31073532639 is a deficient number, since it is larger than the sum of its proper divisors (10768056273).

31073532639 is a wasteful number, since it uses less digits than its factorization.

31073532639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102553017.

The product of its (nonzero) digits is 306180, while the sum is 42.

The spelling of 31073532639 in words is "thirty-one billion, seventy-three million, five hundred thirty-two thousand, six hundred thirty-nine".