256266036277 has 16 divisors (see below), whose sum is σ = 261045330480. Its totient is φ = 251533320192.

The previous prime is 256266036241. The next prime is 256266036281. The reversal of 256266036277 is 772630662652.

It can be written as a sum of positive squares in 8 ways, for example, as 1166290801 + 255099745476 = 34151^2 + 505074^2 .

It is a cyclic number.

It is not a de Polignac number, because 256266036277 - 2²³ = 256257647669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256266036227) 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, 29273133 + ... + 29281885.

It is an arithmetic number, because the mean of its divisors is an integer number (16315333155).

Almost surely, 2^256266036277 is an apocalyptic number.

It is an amenable number.

256266036277 is a deficient number, since it is larger than the sum of its proper divisors (4779294203).

256266036277 is a wasteful number, since it uses less digits than its factorization.

256266036277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11352.

The product of its (nonzero) digits is 7620480, while the sum is 52.

The spelling of 256266036277 in words is "two hundred fifty-six billion, two hundred sixty-six million, thirty-six thousand, two hundred seventy-seven".