256332646042051 has 2 divisors, whose sum is σ = 256332646042052. Its totient is φ = 256332646042050.

The previous prime is 256332646042021. The next prime is 256332646042097. The reversal of 256332646042051 is 150240646233652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256332646042051 - 2²⁹ = 256332109171139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256332646041986 and 256332646042004.

It is not a weakly prime, because it can be changed into another prime (256332646042021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128166323021025 + 128166323021026.

It is an arithmetic number, because the mean of its divisors is an integer number (128166323021026).

Almost surely, 2^{256332646042051} is an apocalyptic number.

256332646042051 is a deficient number, since it is larger than the sum of its proper divisors (1).

256332646042051 is an equidigital number, since it uses as much as digits as its factorization.

256332646042051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 256332646042051 in words is "two hundred fifty-six trillion, three hundred thirty-two billion, six hundred forty-six million, forty-two thousand, fifty-one".