255152638391 has 4 divisors (see below), whose sum is σ = 291603015312. Its totient is φ = 218702261472.

The previous prime is 255152638309. The next prime is 255152638409. The reversal of 255152638391 is 193836251552.

255152638391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 255152638391 - 2³⁴ = 237972769207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255152637391) 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 3 ways as a sum of consecutive naturals, for example, 18225188450 + ... + 18225188463.

It is an arithmetic number, because the mean of its divisors is an integer number (72900753828).

Almost surely, 2^255152638391 is an apocalyptic number.

255152638391 is a deficient number, since it is larger than the sum of its proper divisors (36450376921).

255152638391 is an equidigital number, since it uses as much as digits as its factorization.

255152638391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36450376920.

The product of its digits is 1944000, while the sum is 50.

The spelling of 255152638391 in words is "two hundred fifty-five billion, one hundred fifty-two million, six hundred thirty-eight thousand, three hundred ninety-one".