256674885361 has 8 divisors (see below), whose sum is σ = 257909639648. Its totient is φ = 255440304000.

The previous prime is 256674885347. The next prime is 256674885409. The reversal of 256674885361 is 163588476652.

It is a happy number.

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 256674885361 - 2¹³ = 256674877169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256674885361.

It is not an unprimeable number, because it can be changed into a prime (256674885301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3713326 + ... + 3781816.

It is an arithmetic number, because the mean of its divisors is an integer number (32238704956).

Almost surely, 2^256674885361 is an apocalyptic number.

It is an amenable number.

256674885361 is a deficient number, since it is larger than the sum of its proper divisors (1234754287).

256674885361 is a wasteful number, since it uses less digits than its factorization.

256674885361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86463.

The product of its digits is 58060800, while the sum is 61.

The spelling of 256674885361 in words is "two hundred fifty-six billion, six hundred seventy-four million, eight hundred eighty-five thousand, three hundred sixty-one".