256715923694 has 8 divisors (see below), whose sum is σ = 385385185848. Its totient is φ = 128254195080.

The previous prime is 256715923693. The next prime is 256715923753. The reversal of 256715923694 is 496329517652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256715923691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51880292 + ... + 51885239.

It is an arithmetic number, because the mean of its divisors is an integer number (48173148231).

Almost surely, 2^256715923694 is an apocalyptic number.

256715923694 is a deficient number, since it is larger than the sum of its proper divisors (128669262154).

256715923694 is a wasteful number, since it uses less digits than its factorization.

256715923694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103766770.

The product of its digits is 24494400, while the sum is 59.

The spelling of 256715923694 in words is "two hundred fifty-six billion, seven hundred fifteen million, nine hundred twenty-three thousand, six hundred ninety-four".