256772278304 has 48 divisors (see below), whose sum is σ = 515143563480. Its totient is φ = 125942968320.

The previous prime is 256772278241. The next prime is 256772278307. The reversal of 256772278304 is 403872277652.

It can be written as a sum of positive squares in 4 ways, for example, as 249052898704 + 7719379600 = 499052^2 + 87860^2 .

It is a super-4 number, since 4×256772278304⁴ (a number of 47 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is not an unprimeable number, because it can be changed into a prime (256772278307) 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, 17497082 + ... + 17511750.

Almost surely, 2^256772278304 is an apocalyptic number.

It is an amenable number.

256772278304 is an abundant number, since it is smaller than the sum of its proper divisors (258371285176).

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

256772278304 is a wasteful number, since it uses less digits than its factorization.

256772278304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25053 (or 25045 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 53.

The spelling of 256772278304 in words is "two hundred fifty-six billion, seven hundred seventy-two million, two hundred seventy-eight thousand, three hundred four".