256621123332703 has 24 divisors (see below), whose sum is σ = 265439809095552. Its totient is φ = 248080456750464.

The previous prime is 256621123332689. The next prime is 256621123332727. The reversal of 256621123332703 is 307233321126652.

It is not a de Polignac number, because 256621123332703 - 2⁵ = 256621123332671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256621123332103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6169201101 + ... + 6169242697.

It is an arithmetic number, because the mean of its divisors is an integer number (11059992045648).

Almost surely, 2^{256621123332703} is an apocalyptic number.

256621123332703 is a deficient number, since it is larger than the sum of its proper divisors (8818685762849).

256621123332703 is a wasteful number, since it uses less digits than its factorization.

256621123332703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70531 (or 70494 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 46.

The spelling of 256621123332703 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, one hundred twenty-three million, three hundred thirty-two thousand, seven hundred three".