256781496 has 16 divisors (see below), whose sum is σ = 641953800. Its totient is φ = 85593824.

The previous prime is 256781479. The next prime is 256781501. The reversal of 256781496 is 694187652.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5349591 + ... + 5349638.

Almost surely, 2^256781496 is an apocalyptic number.

It is an amenable number.

256781496 is an abundant number, since it is smaller than the sum of its proper divisors (385172304).

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

256781496 is a wasteful number, since it uses less digits than its factorization.

256781496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10699238 (or 10699234 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 256781496 is about 16024.4031402109. The cubic root of 256781496 is about 635.6058829547.

The spelling of 256781496 in words is "two hundred fifty-six million, seven hundred eighty-one thousand, four hundred ninety-six".