255515707123 has 4 divisors (see below), whose sum is σ = 259846481880. Its totient is φ = 251184932368.

The previous prime is 255515707067. The next prime is 255515707159. The reversal of 255515707123 is 321707515552.

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 255515707123 - 2³⁷ = 118076753651 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 255515707123.

It is not an unprimeable number, because it can be changed into a prime (255515701123) 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, 2165387290 + ... + 2165387407.

It is an arithmetic number, because the mean of its divisors is an integer number (64961620470).

Almost surely, 2^255515707123 is an apocalyptic number.

255515707123 is a deficient number, since it is larger than the sum of its proper divisors (4330774757).

255515707123 is an equidigital number, since it uses as much as digits as its factorization.

255515707123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330774756.

The product of its (nonzero) digits is 367500, while the sum is 43.

The spelling of 255515707123 in words is "two hundred fifty-five billion, five hundred fifteen million, seven hundred seven thousand, one hundred twenty-three".