256376165863 has 4 divisors (see below), whose sum is σ = 256655139760. Its totient is φ = 256097191968.

The previous prime is 256376165797. The next prime is 256376165873. The reversal of 256376165863 is 368561673652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256376165863 is a prime.

It is a super-2 number, since 2×256376165863² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256376165798 and 256376165807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256376165873) 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, 139485570 + ... + 139487407.

It is an arithmetic number, because the mean of its divisors is an integer number (64163784940).

Almost surely, 2^256376165863 is an apocalyptic number.

256376165863 is a deficient number, since it is larger than the sum of its proper divisors (278973897).

256376165863 is an equidigital number, since it uses as much as digits as its factorization.

256376165863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278973896.

The product of its digits is 32659200, while the sum is 58.

The spelling of 256376165863 in words is "two hundred fifty-six billion, three hundred seventy-six million, one hundred sixty-five thousand, eight hundred sixty-three".