256770694 has 4 divisors (see below), whose sum is σ = 385156044. Its totient is φ = 128385346.

The previous prime is 256770623. The next prime is 256770697. The reversal of 256770694 is 496077652.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256770697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64192672 + ... + 64192675.

It is an arithmetic number, because the mean of its divisors is an integer number (96289011).

Almost surely, 2^256770694 is an apocalyptic number.

256770694 is a deficient number, since it is larger than the sum of its proper divisors (128385350).

256770694 is a wasteful number, since it uses less digits than its factorization.

256770694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128385349.

The product of its (nonzero) digits is 635040, while the sum is 46.

The square root of 256770694 is about 16024.0660882312. The cubic root of 256770694 is about 635.5969701746.

The spelling of 256770694 in words is "two hundred fifty-six million, seven hundred seventy thousand, six hundred ninety-four".