256735537679 has 2 divisors, whose sum is σ = 256735537680. Its totient is φ = 256735537678.

The previous prime is 256735537649. The next prime is 256735537691. The reversal of 256735537679 is 976735537652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256735537679 - 2⁸ = 256735537423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256735537649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128367768839 + 128367768840.

It is an arithmetic number, because the mean of its divisors is an integer number (128367768840).

Almost surely, 2^256735537679 is an apocalyptic number.

256735537679 is a deficient number, since it is larger than the sum of its proper divisors (1).

256735537679 is an equidigital number, since it uses as much as digits as its factorization.

256735537679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 250047000, while the sum is 65.

The spelling of 256735537679 in words is "two hundred fifty-six billion, seven hundred thirty-five million, five hundred thirty-seven thousand, six hundred seventy-nine".