31493859864 has 64 divisors (see below), whose sum is σ = 84002624640. Its totient is φ = 9804986880.

The previous prime is 31493859851. The next prime is 31493859869. The reversal of 31493859864 is 46895839413.

It is a junction number, because it is equal to n+sod(n) for n = 31493859798 and 31493859807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31493859869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241174 + ... + 348069.

It is an arithmetic number, because the mean of its divisors is an integer number (1312541010).

Almost surely, 2^31493859864 is an apocalyptic number.

31493859864 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31493859864 is an abundant number, since it is smaller than the sum of its proper divisors (52508764776).

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

31493859864 is a wasteful number, since it uses less digits than its factorization.

31493859864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589400 (or 589396 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 60.

The spelling of 31493859864 in words is "thirty-one billion, four hundred ninety-three million, eight hundred fifty-nine thousand, eight hundred sixty-four".