255718996187 has 4 divisors (see below), whose sum is σ = 263967996096. Its totient is φ = 247469996280.

The previous prime is 255718996153. The next prime is 255718996207. The reversal of 255718996187 is 781699817552.

255718996187 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 255718996187 - 2⁶ = 255718996123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255718996787) 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, 4124499908 + ... + 4124499969.

It is an arithmetic number, because the mean of its divisors is an integer number (65991999024).

Almost surely, 2^255718996187 is an apocalyptic number.

255718996187 is a deficient number, since it is larger than the sum of its proper divisors (8248999909).

255718996187 is an equidigital number, since it uses as much as digits as its factorization.

255718996187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8248999908.

The product of its digits is 76204800, while the sum is 68.

The spelling of 255718996187 in words is "two hundred fifty-five billion, seven hundred eighteen million, nine hundred ninety-six thousand, one hundred eighty-seven".