256680769245 has 16 divisors (see below), whose sum is σ = 420240144192. Its totient is φ = 133712772480.

The previous prime is 256680769237. The next prime is 256680769253. The reversal of 256680769245 is 542967086652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (256680769237) and next prime (256680769253).

It is not a de Polignac number, because 256680769245 - 2³ = 256680769237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198976696 + ... + 198977985.

It is an arithmetic number, because the mean of its divisors is an integer number (26265009012).

Almost surely, 2^256680769245 is an apocalyptic number.

It is an amenable number.

256680769245 is a deficient number, since it is larger than the sum of its proper divisors (163559374947).

256680769245 is a wasteful number, since it uses less digits than its factorization.

256680769245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397954732.

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 256680769245 in words is "two hundred fifty-six billion, six hundred eighty million, seven hundred sixty-nine thousand, two hundred forty-five".