256477031116427 has 16 divisors (see below), whose sum is σ = 281649691275264. Its totient is φ = 231613838520000.

The previous prime is 256477031116417. The next prime is 256477031116469. The reversal of 256477031116427 is 724611130774652.

It is a cyclic number.

It is not a de Polignac number, because 256477031116427 - 2³⁰ = 256475957374603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256477031116417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133305143 + ... + 135215439.

It is an arithmetic number, because the mean of its divisors is an integer number (17603105704704).

Almost surely, 2^{256477031116427} is an apocalyptic number.

256477031116427 is a deficient number, since it is larger than the sum of its proper divisors (25172660158837).

256477031116427 is a wasteful number, since it uses less digits than its factorization.

256477031116427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991290.

The product of its (nonzero) digits is 11854080, while the sum is 56.

The spelling of 256477031116427 in words is "two hundred fifty-six trillion, four hundred seventy-seven billion, thirty-one million, one hundred sixteen thousand, four hundred twenty-seven".