256161616800751 has 2 divisors, whose sum is σ = 256161616800752. Its totient is φ = 256161616800750.

The previous prime is 256161616800743. The next prime is 256161616800779. The reversal of 256161616800751 is 157008616161652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256161616800751 - 2³ = 256161616800743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256161616800692 and 256161616800701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256161616800781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128080808400375 + 128080808400376.

It is an arithmetic number, because the mean of its divisors is an integer number (128080808400376).

Almost surely, 2^{256161616800751} is an apocalyptic number.

256161616800751 is a deficient number, since it is larger than the sum of its proper divisors (1).

256161616800751 is an equidigital number, since it uses as much as digits as its factorization.

256161616800751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 256161616800751 in words is "two hundred fifty-six trillion, one hundred sixty-one billion, six hundred sixteen million, eight hundred thousand, seven hundred fifty-one".