123815854079 has 12 divisors (see below), whose sum is σ = 128219162832. Its totient is φ = 119559178080.

The previous prime is 123815854073. The next prime is 123815854109. The reversal of 123815854079 is 970458518321.

It is not a de Polignac number, because 123815854079 - 2²⁰ = 123814805503 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

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 123815854079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123815854073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 298214 + ... + 580140.

It is an arithmetic number, because the mean of its divisors is an integer number (10684930236).

Almost surely, 2^123815854079 is an apocalyptic number.

123815854079 is a deficient number, since it is larger than the sum of its proper divisors (4403308753).

123815854079 is an equidigital number, since it uses as much as digits as its factorization.

123815854079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282446 (or 282415 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 123815854079 in words is "one hundred twenty-three billion, eight hundred fifteen million, eight hundred fifty-four thousand, seventy-nine".