256516733627455 has 8 divisors (see below), whose sum is σ = 351794377546272. Its totient is φ = 175897188773088.

The previous prime is 256516733627417. The next prime is 256516733627467. The reversal of 256516733627455 is 554726337615652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256516733627455 - 2⁴⁵ = 221332361538623 is a prime.

It is a Duffinian number.

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, 3664524766072 + ... + 3664524766141.

It is an arithmetic number, because the mean of its divisors is an integer number (43974297193284).

Almost surely, 2^{256516733627455} is an apocalyptic number.

256516733627455 is a deficient number, since it is larger than the sum of its proper divisors (95277643918817).

256516733627455 is an equidigital number, since it uses as much as digits as its factorization.

256516733627455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7329049532225.

The product of its digits is 952560000, while the sum is 67.

The spelling of 256516733627455 in words is "two hundred fifty-six trillion, five hundred sixteen billion, seven hundred thirty-three million, six hundred twenty-seven thousand, four hundred fifty-five".