256612774336514 has 4 divisors (see below), whose sum is σ = 384919161504774. Its totient is φ = 128306387168256.

The previous prime is 256612774336439. The next prime is 256612774336519. The reversal of 256612774336514 is 415633477216652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 146963079945889 + 109649694390625 = 12122833^2 + 10471375^2 .

It is not an unprimeable number, because it can be changed into a prime (256612774336519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64153193584127 + ... + 64153193584130.

Almost surely, 2^{256612774336514} is an apocalyptic number.

256612774336514 is a deficient number, since it is larger than the sum of its proper divisors (128306387168260).

256612774336514 is a wasteful number, since it uses less digits than its factorization.

256612774336514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128306387168259.

The product of its digits is 152409600, while the sum is 62.

The spelling of 256612774336514 in words is "two hundred fifty-six trillion, six hundred twelve billion, seven hundred seventy-four million, three hundred thirty-six thousand, five hundred fourteen".