256178828613 has 8 divisors (see below), whose sum is σ = 345687094368. Its totient is φ = 168728224304.

The previous prime is 256178828557. The next prime is 256178828621. The reversal of 256178828613 is 316828871652.

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

It is a cyclic number.

It is not a de Polignac number, because 256178828613 - 2⁸ = 256178828357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256178828663) 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, 514415070 + ... + 514415567.

It is an arithmetic number, because the mean of its divisors is an integer number (43210886796).

Almost surely, 2^256178828613 is an apocalyptic number.

It is an amenable number.

256178828613 is a deficient number, since it is larger than the sum of its proper divisors (89508265755).

256178828613 is a wasteful number, since it uses less digits than its factorization.

256178828613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028830723.

The product of its digits is 7741440, while the sum is 57.

The spelling of 256178828613 in words is "two hundred fifty-six billion, one hundred seventy-eight million, eight hundred twenty-eight thousand, six hundred thirteen".