256116323405 has 16 divisors (see below), whose sum is σ = 323597383680. Its totient is φ = 194059996992.

The previous prime is 256116323363. The next prime is 256116323413. The reversal of 256116323405 is 504323611652.

It is a cyclic number.

It is not a de Polignac number, because 256116323405 - 2¹⁴ = 256116307021 is a prime.

It is a super-2 number, since 2×256116323405² (a number of 24 digits) contains 22 as substring.

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, 37067 + ... + 716663.

It is an arithmetic number, because the mean of its divisors is an integer number (20224836480).

Almost surely, 2^256116323405 is an apocalyptic number.

It is an amenable number.

256116323405 is a deficient number, since it is larger than the sum of its proper divisors (67481060275).

256116323405 is a wasteful number, since it uses less digits than its factorization.

256116323405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683588.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 256116323405 in words is "two hundred fifty-six billion, one hundred sixteen million, three hundred twenty-three thousand, four hundred five".