256552756 has 6 divisors (see below), whose sum is σ = 448967330. Its totient is φ = 128276376.

The previous prime is 256552753. The next prime is 256552759. The reversal of 256552756 is 657255652.

It is an interprime number because it is at equal distance from previous prime (256552753) and next prime (256552759).

It can be written as a sum of positive squares in only one way, i.e., 134096400 + 122456356 = 11580^2 + 11066^2 .

It is a super-2 number, since 2×256552756² = 131638633222391072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256552753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32069091 + ... + 32069098.

Almost surely, 2^256552756 is an apocalyptic number.

It is an amenable number.

256552756 is a deficient number, since it is larger than the sum of its proper divisors (192414574).

256552756 is a wasteful number, since it uses less digits than its factorization.

256552756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64138193 (or 64138191 counting only the distinct ones).

The product of its digits is 630000, while the sum is 43.

The square root of 256552756 is about 16017.2643107367. The cubic root of 256552756 is about 635.4170951022.

The spelling of 256552756 in words is "two hundred fifty-six million, five hundred fifty-two thousand, seven hundred fifty-six".