256013396923191 has 16 divisors (see below), whose sum is σ = 342937822988160. Its totient is φ = 169882701841440.

The previous prime is 256013396923103. The next prime is 256013396923217. The reversal of 256013396923191 is 191329693310652.

It is a de Polignac number, because none of the positive numbers 2^k-256013396923191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256013396923091) 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, 49724565 + ... + 54631118.

It is an arithmetic number, because the mean of its divisors is an integer number (21433613936760).

Almost surely, 2^{256013396923191} is an apocalyptic number.

256013396923191 is a deficient number, since it is larger than the sum of its proper divisors (86924426064969).

256013396923191 is a wasteful number, since it uses less digits than its factorization.

256013396923191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104359486.

The product of its (nonzero) digits is 14171760, while the sum is 60.

The spelling of 256013396923191 in words is "two hundred fifty-six trillion, thirteen billion, three hundred ninety-six million, nine hundred twenty-three thousand, one hundred ninety-one".