256611477254205 has 16 divisors (see below), whose sum is σ = 410599246961664. Its totient is φ = 136852493417280.

The previous prime is 256611477254147. The next prime is 256611477254261. The reversal of 256611477254205 is 502452774116652.

It is a happy number.

256611477254205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256611477254205 - 2²² = 256611473059901 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434765149 + ... + 435354978.

It is an arithmetic number, because the mean of its divisors is an integer number (25662452935104).

Almost surely, 2^{256611477254205} is an apocalyptic number.

It is an amenable number.

256611477254205 is a deficient number, since it is larger than the sum of its proper divisors (153987769707459).

256611477254205 is a wasteful number, since it uses less digits than its factorization.

256611477254205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870139796.

The product of its (nonzero) digits is 28224000, while the sum is 57.

The spelling of 256611477254205 in words is "two hundred fifty-six trillion, six hundred eleven billion, four hundred seventy-seven million, two hundred fifty-four thousand, two hundred five".