256934759777 has 2 divisors, whose sum is σ = 256934759778. Its totient is φ = 256934759776.

The previous prime is 256934759771. The next prime is 256934759791. The reversal of 256934759777 is 777957439652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250489239121 + 6445520656 = 500489^2 + 80284^2 .

It is a cyclic number.

It is not a de Polignac number, because 256934759777 - 2¹² = 256934755681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256934759777.

It is not a weakly prime, because it can be changed into another prime (256934759771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128467379888 + 128467379889.

It is an arithmetic number, because the mean of its divisors is an integer number (128467379889).

Almost surely, 2^256934759777 is an apocalyptic number.

It is an amenable number.

256934759777 is a deficient number, since it is larger than the sum of its proper divisors (1).

256934759777 is an equidigital number, since it uses as much as digits as its factorization.

256934759777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 700131600, while the sum is 71.

The spelling of 256934759777 in words is "two hundred fifty-six billion, nine hundred thirty-four million, seven hundred fifty-nine thousand, seven hundred seventy-seven".