256744353523260 has 48 divisors (see below), whose sum is σ = 761171495154336. Its totient is φ = 64437798531072.

The previous prime is 256744353523249. The next prime is 256744353523261. The reversal of 256744353523260 is 62325353447652.

It is a super-2 number, since 2×256744353523260² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256744353523260.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256744353523261) 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, 125855074237 + ... + 125855076276.

It is an arithmetic number, because the mean of its divisors is an integer number (15857739482382).

Almost surely, 2^{256744353523260} is an apocalyptic number.

256744353523260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256744353523260 is an abundant number, since it is smaller than the sum of its proper divisors (504427141631076).

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

256744353523260 is a wasteful number, since it uses less digits than its factorization.

256744353523260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251710150542 (or 251710150540 counting only the distinct ones).

The product of its (nonzero) digits is 108864000, while the sum is 57.

The spelling of 256744353523260 in words is "two hundred fifty-six trillion, seven hundred forty-four billion, three hundred fifty-three million, five hundred twenty-three thousand, two hundred sixty".