31217436081408 has 144 divisors (see below), whose sum is σ = 87036832915200. Its totient is φ = 9919813263360.

The previous prime is 31217436081367. The next prime is 31217436081427. The reversal of 31217436081408 is 80418063471213.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7111683 + ... + 10630658.

It is an arithmetic number, because the mean of its divisors is an integer number (604422450800).

Almost surely, 2^{31217436081408} is an apocalyptic number.

It is an amenable number.

31217436081408 is an abundant number, since it is smaller than the sum of its proper divisors (55819396833792).

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

31217436081408 is a wasteful number, since it uses less digits than its factorization.

31217436081408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17742468 (or 17742454 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 31217436081408 in words is "thirty-one trillion, two hundred seventeen billion, four hundred thirty-six million, eighty-one thousand, four hundred eight".