256074579947 has 4 divisors (see below), whose sum is σ = 267208257360. Its totient is φ = 244940902536.

The previous prime is 256074579907. The next prime is 256074579967. The reversal of 256074579947 is 749975470652.

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

It is a cyclic number.

It is not a de Polignac number, because 256074579947 - 2¹⁶ = 256074514411 is a prime.

It is a super-3 number, since 3×256074579947³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (256074579907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5566838672 + ... + 5566838717.

It is an arithmetic number, because the mean of its divisors is an integer number (66802064340).

Almost surely, 2^256074579947 is an apocalyptic number.

256074579947 is a deficient number, since it is larger than the sum of its proper divisors (11133677413).

256074579947 is a wasteful number, since it uses less digits than its factorization.

256074579947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11133677412.

The product of its (nonzero) digits is 133358400, while the sum is 65.

The spelling of 256074579947 in words is "two hundred fifty-six billion, seventy-four million, five hundred seventy-nine thousand, nine hundred forty-seven".