256620777331060 has 24 divisors (see below), whose sum is σ = 538914395998440. Its totient is φ = 102646260722304.

The previous prime is 256620777331043. The next prime is 256620777331067. The reversal of 256620777331060 is 60133777026652.

256620777331060 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7053199277796 + 249567578053264 = 2655786^2 + 15797708^2 .

It is a junction number, because it is equal to n+sod(n) for n = 256620777330992 and 256620777331010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256620777331067) 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, 127111555 + ... + 129114634.

It is an arithmetic number, because the mean of its divisors is an integer number (22454766499935).

Almost surely, 2^{256620777331060} is an apocalyptic number.

256620777331060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256620777331060 is an abundant number, since it is smaller than the sum of its proper divisors (282293618667380).

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

256620777331060 is a wasteful number, since it uses less digits than its factorization.

256620777331060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256276275 (or 256276273 counting only the distinct ones).

The product of its (nonzero) digits is 13335840, while the sum is 55.

The spelling of 256620777331060 in words is "two hundred fifty-six trillion, six hundred twenty billion, seven hundred seventy-seven million, three hundred thirty-one thousand, sixty".