256759671 has 16 divisors (see below), whose sum is σ = 400796928. Its totient is φ = 143140800.

The previous prime is 256759669. The next prime is 256759691. The reversal of 256759671 is 176957652.

It is not a de Polignac number, because 256759671 - 2¹ = 256759669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256759671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256759651) 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, 148245 + ... + 149966.

It is an arithmetic number, because the mean of its divisors is an integer number (25049808).

Almost surely, 2^256759671 is an apocalyptic number.

256759671 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

256759671 is a deficient number, since it is larger than the sum of its proper divisors (144037257).

256759671 is a wasteful number, since it uses less digits than its factorization.

256759671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298262.

The product of its digits is 793800, while the sum is 48.

The square root of 256759671 is about 16023.7221331375. The cubic root of 256759671 is about 635.5878747887.

The spelling of 256759671 in words is "two hundred fifty-six million, seven hundred fifty-nine thousand, six hundred seventy-one".