256477701261674 has 4 divisors (see below), whose sum is σ = 384716551892514. Its totient is φ = 128238850630836.

The previous prime is 256477701261569. The next prime is 256477701261689. The reversal of 256477701261674 is 476162107774652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 175047056386225 + 81430644875449 = 13230535^2 + 9023893^2 .

It is a super-2 number, since 2×256477701261674² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256477701261674.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64119425315417 + ... + 64119425315420.

Almost surely, 2^{256477701261674} is an apocalyptic number.

256477701261674 is a deficient number, since it is larger than the sum of its proper divisors (128238850630840).

256477701261674 is a wasteful number, since it uses less digits than its factorization.

256477701261674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128238850630839.

The product of its (nonzero) digits is 165957120, while the sum is 65.

The spelling of 256477701261674 in words is "two hundred fifty-six trillion, four hundred seventy-seven billion, seven hundred one million, two hundred sixty-one thousand, six hundred seventy-four".