256276761 has 8 divisors (see below), whose sum is σ = 367987200. Its totient is φ = 157708752.

The previous prime is 256276739. The next prime is 256276789. The reversal of 256276761 is 167672652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256276761 - 2¹⁴ = 256260377 is a prime.

It is a super-2 number, since 2×256276761² = 131355556457302242, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (256276061) 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, 3285561 + ... + 3285638.

It is an arithmetic number, because the mean of its divisors is an integer number (45998400).

Almost surely, 2^256276761 is an apocalyptic number.

It is an amenable number.

256276761 is a deficient number, since it is larger than the sum of its proper divisors (111710439).

256276761 is a wasteful number, since it uses less digits than its factorization.

256276761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6571215.

The product of its digits is 211680, while the sum is 42.

The square root of 256276761 is about 16008.6464449684. The cubic root of 256276761 is about 635.1891564528.

The spelling of 256276761 in words is "two hundred fifty-six million, two hundred seventy-six thousand, seven hundred sixty-one".