256517414223644 has 24 divisors (see below), whose sum is σ = 514062954384000. Its totient is φ = 109715721966576.

The previous prime is 256517414223613. The next prime is 256517414223659. The reversal of 256517414223644 is 446322414715652.

It is a self number, because there is not a number n which added to its sum of digits gives 256517414223644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9179681642 + ... + 9179709585.

It is an arithmetic number, because the mean of its divisors is an integer number (21419289766000).

Almost surely, 2^{256517414223644} is an apocalyptic number.

It is an amenable number.

256517414223644 is an abundant number, since it is smaller than the sum of its proper divisors (257545540160356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256517414223644 is a wasteful number, since it uses less digits than its factorization.

256517414223644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18359391737 (or 18359391735 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 56.

The spelling of 256517414223644 in words is "two hundred fifty-six trillion, five hundred seventeen billion, four hundred fourteen million, two hundred twenty-three thousand, six hundred forty-four".