31420635554256 has 160 divisors (see below), whose sum is σ = 88653525811200. Its totient is φ = 9530803699200.

The previous prime is 31420635554251. The next prime is 31420635554323. The reversal of 31420635554256 is 65245553602413.

It is a junction number, because it is equal to n+sod(n) for n = 31420635554199 and 31420635554208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31420635554251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 567019191 + ... + 567074601.

It is an arithmetic number, because the mean of its divisors is an integer number (554084536320).

Almost surely, 2^{31420635554256} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31420635554256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44326762905600).

31420635554256 is an abundant number, since it is smaller than the sum of its proper divisors (57232890256944).

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

31420635554256 is a wasteful number, since it uses less digits than its factorization.

31420635554256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68305 (or 68299 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 51.

The spelling of 31420635554256 in words is "thirty-one trillion, four hundred twenty billion, six hundred thirty-five million, five hundred fifty-four thousand, two hundred fifty-six".