256477560430705 has 16 divisors (see below), whose sum is σ = 308116370003904. Its totient is φ = 204953310486720.

The previous prime is 256477560430697. The next prime is 256477560430709. The reversal of 256477560430705 is 507034065774652.

256477560430705 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 256477560430705 - 2³ = 256477560430697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256477560430709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8198710 + ... + 24086800.

It is an arithmetic number, because the mean of its divisors is an integer number (19257273125244).

Almost surely, 2^{256477560430705} is an apocalyptic number.

It is an amenable number.

256477560430705 is a deficient number, since it is larger than the sum of its proper divisors (51638809573199).

256477560430705 is a wasteful number, since it uses less digits than its factorization.

256477560430705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15891696.

The product of its (nonzero) digits is 148176000, while the sum is 61.

The spelling of 256477560430705 in words is "two hundred fifty-six trillion, four hundred seventy-seven billion, five hundred sixty million, four hundred thirty thousand, seven hundred five".