256469377033 has 2 divisors, whose sum is σ = 256469377034. Its totient is φ = 256469377032.

The previous prime is 256469376967. The next prime is 256469377049. The reversal of 256469377033 is 330773964652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250643413449 + 5825963584 = 500643^2 + 76328^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256469377033 is a prime.

It is not a weakly prime, because it can be changed into another prime (256469377093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128234688516 + 128234688517.

It is an arithmetic number, because the mean of its divisors is an integer number (128234688517).

Almost surely, 2^256469377033 is an apocalyptic number.

It is an amenable number.

256469377033 is a deficient number, since it is larger than the sum of its proper divisors (1).

256469377033 is an equidigital number, since it uses as much as digits as its factorization.

256469377033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17146080, while the sum is 55.

The spelling of 256469377033 in words is "two hundred fifty-six billion, four hundred sixty-nine million, three hundred seventy-seven thousand, thirty-three".