256613071364405 has 32 divisors (see below), whose sum is σ = 363281802854400. Its totient is φ = 170285685111360.

The previous prime is 256613071364389. The next prime is 256613071364473. The reversal of 256613071364405 is 504463170316652.

It is a happy number.

It is not a de Polignac number, because 256613071364405 - 2⁴ = 256613071364389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149317196 + ... + 151025994.

It is an arithmetic number, because the mean of its divisors is an integer number (11352556339200).

Almost surely, 2^{256613071364405} is an apocalyptic number.

It is an amenable number.

256613071364405 is a deficient number, since it is larger than the sum of its proper divisors (106668731489995).

256613071364405 is a wasteful number, since it uses less digits than its factorization.

256613071364405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847249.

The product of its (nonzero) digits is 10886400, while the sum is 53.

The spelling of 256613071364405 in words is "two hundred fifty-six trillion, six hundred thirteen billion, seventy-one million, three hundred sixty-four thousand, four hundred five".