255631432163 has 6 divisors (see below), whose sum is σ = 256366121364. Its totient is φ = 254898842424.

The previous prime is 255631432109. The next prime is 255631432183. The reversal of 255631432163 is 361234136552.

255631432163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-255631432163 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 255631432163.

It is not an unprimeable number, because it can be changed into a prime (255631432183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 927581 + ... + 1171182.

It is an arithmetic number, because the mean of its divisors is an integer number (42727686894).

Almost surely, 2^255631432163 is an apocalyptic number.

255631432163 is a deficient number, since it is larger than the sum of its proper divisors (734689201).

255631432163 is an frugal number, since it uses more digits than its factorization.

255631432163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099461 (or 2099112 counting only the distinct ones).

The product of its digits is 388800, while the sum is 41.

The spelling of 255631432163 in words is "two hundred fifty-five billion, six hundred thirty-one million, four hundred thirty-two thousand, one hundred sixty-three".