1256260556351 has 2 divisors, whose sum is σ = 1256260556352. Its totient is φ = 1256260556350.

The previous prime is 1256260556339. The next prime is 1256260556357. The reversal of 1256260556351 is 1536550626521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1256260556351 - 2¹⁴ = 1256260539967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1256260556296 and 1256260556305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256260556357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628130278175 + 628130278176.

It is an arithmetic number, because the mean of its divisors is an integer number (628130278176).

Almost surely, 2^{1256260556351} is an apocalyptic number.

1256260556351 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256260556351 is an equidigital number, since it uses as much as digits as its factorization.

1256260556351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620000, while the sum is 47.

The spelling of 1256260556351 in words is "one trillion, two hundred fifty-six billion, two hundred sixty million, five hundred fifty-six thousand, three hundred fifty-one".