255431634563 has 16 divisors (see below), whose sum is σ = 298488637440. Its totient is φ = 214027439136.

The previous prime is 255431634529. The next prime is 255431634583. The reversal of 255431634563 is 365436134552.

It is not a de Polignac number, because 255431634563 - 2⁶ = 255431634499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (255431634583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186656 + ... + 738717.

It is an arithmetic number, because the mean of its divisors is an integer number (18655539840).

Almost surely, 2^255431634563 is an apocalyptic number.

255431634563 is a deficient number, since it is larger than the sum of its proper divisors (43057002877).

255431634563 is an equidigital number, since it uses as much as digits as its factorization.

255431634563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926266.

The product of its digits is 3888000, while the sum is 47.

The spelling of 255431634563 in words is "two hundred fifty-five billion, four hundred thirty-one million, six hundred thirty-four thousand, five hundred sixty-three".