256050044161 has 4 divisors (see below), whose sum is σ = 257336728000. Its totient is φ = 254763360324.

The previous prime is 256050044141. The next prime is 256050044179. The reversal of 256050044161 is 161440050652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256050044161 - 2⁹ = 256050043649 is a prime.

It is a super-2 number, since 2×256050044161² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256050044141) 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, 643341621 + ... + 643342018.

It is an arithmetic number, because the mean of its divisors is an integer number (64334182000).

Almost surely, 2^256050044161 is an apocalyptic number.

It is an amenable number.

256050044161 is a deficient number, since it is larger than the sum of its proper divisors (1286683839).

256050044161 is a wasteful number, since it uses less digits than its factorization.

256050044161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286683838.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 256050044161 in words is "two hundred fifty-six billion, fifty million, forty-four thousand, one hundred sixty-one".