256655170451 has 2 divisors, whose sum is σ = 256655170452. Its totient is φ = 256655170450.

The previous prime is 256655170423. The next prime is 256655170463. The reversal of 256655170451 is 154071556652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256655170451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256655170396 and 256655170405.

It is not a weakly prime, because it can be changed into another prime (256655170411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128327585225 + 128327585226.

It is an arithmetic number, because the mean of its divisors is an integer number (128327585226).

Almost surely, 2^256655170451 is an apocalyptic number.

256655170451 is a deficient number, since it is larger than the sum of its proper divisors (1).

256655170451 is an equidigital number, since it uses as much as digits as its factorization.

256655170451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260000, while the sum is 47.

The spelling of 256655170451 in words is "two hundred fifty-six billion, six hundred fifty-five million, one hundred seventy thousand, four hundred fifty-one".