256762766278 has 16 divisors (see below), whose sum is σ = 412381711440. Its totient is φ = 119471900416.

The previous prime is 256762766269. The next prime is 256762766279. The reversal of 256762766278 is 872667267652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256762766279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42423076 + ... + 42429127.

It is an arithmetic number, because the mean of its divisors is an integer number (25773856965).

Almost surely, 2^256762766278 is an apocalyptic number.

256762766278 is a deficient number, since it is larger than the sum of its proper divisors (155618945162).

256762766278 is a wasteful number, since it uses less digits than its factorization.

256762766278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84852311.

The product of its digits is 142248960, while the sum is 64.

The spelling of 256762766278 in words is "two hundred fifty-six billion, seven hundred sixty-two million, seven hundred sixty-six thousand, two hundred seventy-eight".