256931427037 has 2 divisors, whose sum is σ = 256931427038. Its totient is φ = 256931427036.

The previous prime is 256931426959. The next prime is 256931427131. The reversal of 256931427037 is 730724139652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141215117796 + 115716309241 = 375786^2 + 340171^2 .

It is a cyclic number.

It is not a de Polignac number, because 256931427037 - 2¹⁹ = 256930902749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256991427037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128465713518 + 128465713519.

It is an arithmetic number, because the mean of its divisors is an integer number (128465713519).

Almost surely, 2^256931427037 is an apocalyptic number.

It is an amenable number.

256931427037 is a deficient number, since it is larger than the sum of its proper divisors (1).

256931427037 is an equidigital number, since it uses as much as digits as its factorization.

256931427037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 49.

The spelling of 256931427037 in words is "two hundred fifty-six billion, nine hundred thirty-one million, four hundred twenty-seven thousand, thirty-seven".