31359940886421 has 72 divisors (see below), whose sum is σ = 54000739069056. Its totient is φ = 17172969952320.

The previous prime is 31359940886383. The next prime is 31359940886429. The reversal of 31359940886421 is 12468804995313.

31359940886421 is a `hidden beast` number, since 3 + 1 + 3 + 5 + 99 + 40 + 8 + 86 + 421 = 666.

It is not a de Polignac number, because 31359940886421 - 2⁶ = 31359940886357 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31359940886429) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3634056 + ... + 8713566.

It is an arithmetic number, because the mean of its divisors is an integer number (750010264848).

Almost surely, 2^{31359940886421} is an apocalyptic number.

It is an amenable number.

31359940886421 is a deficient number, since it is larger than the sum of its proper divisors (22640798182635).

31359940886421 is a wasteful number, since it uses less digits than its factorization.

31359940886421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5079663 (or 5079617 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 31359940886421 in words is "thirty-one trillion, three hundred fifty-nine billion, nine hundred forty million, eight hundred eighty-six thousand, four hundred twenty-one".