256726354172536 has 16 divisors (see below), whose sum is σ = 481365476970840. Its totient is φ = 128362226980320.

The previous prime is 256726354172459. The next prime is 256726354172543. The reversal of 256726354172536 is 635271453627652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117614206 + ... + 119777101.

Almost surely, 2^{256726354172536} is an apocalyptic number.

It is an amenable number.

256726354172536 is a deficient number, since it is larger than the sum of its proper divisors (224639122798304).

256726354172536 is a wasteful number, since it uses less digits than its factorization.

256726354172536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237526494 (or 237526490 counting only the distinct ones).

The product of its digits is 381024000, while the sum is 64.

The spelling of 256726354172536 in words is "two hundred fifty-six trillion, seven hundred twenty-six billion, three hundred fifty-four million, one hundred seventy-two thousand, five hundred thirty-six".