255640056163 has 4 divisors (see below), whose sum is σ = 255641664040. Its totient is φ = 255638448288.

The previous prime is 255640056149. The next prime is 255640056193. The reversal of 255640056163 is 361650046552.

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 255640056163 - 2⁵ = 255640056131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255640056193) 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, 535593 + ... + 893386.

It is an arithmetic number, because the mean of its divisors is an integer number (63910416010).

Almost surely, 2^255640056163 is an apocalyptic number.

255640056163 is a deficient number, since it is larger than the sum of its proper divisors (1607877).

255640056163 is a wasteful number, since it uses less digits than its factorization.

255640056163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607876.

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 255640056163 in words is "two hundred fifty-five billion, six hundred forty million, fifty-six thousand, one hundred sixty-three".