255555124239999 has 4 divisors (see below), whose sum is σ = 340740165653336. Its totient is φ = 170370082826664.

The previous prime is 255555124239983. The next prime is 255555124240007. The reversal of 255555124239999 is 999932421555552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 255555124239999 - 2⁴ = 255555124239983 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 255555124239999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255555124239949) 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, 42592520706664 + ... + 42592520706669.

It is an arithmetic number, because the mean of its divisors is an integer number (85185041413334).

Almost surely, 2^{255555124239999} is an apocalyptic number.

255555124239999 is a deficient number, since it is larger than the sum of its proper divisors (85185041413337).

255555124239999 is an equidigital number, since it uses as much as digits as its factorization.

255555124239999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85185041413336.

The product of its digits is 1968300000, while the sum is 75.

The spelling of 255555124239999 in words is "two hundred fifty-five trillion, five hundred fifty-five billion, one hundred twenty-four million, two hundred thirty-nine thousand, nine hundred ninety-nine".