123815854108 has 12 divisors (see below), whose sum is σ = 219112326720. Its totient is φ = 61212332192.

The previous prime is 123815854073. The next prime is 123815854109. The reversal of 123815854108 is 801458518321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123815854109) 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, 173898316 + ... + 173899027.

It is an arithmetic number, because the mean of its divisors is an integer number (18259360560).

Almost surely, 2^123815854108 is an apocalyptic number.

It is an amenable number.

123815854108 is a deficient number, since it is larger than the sum of its proper divisors (95296472612).

123815854108 is a wasteful number, since it uses less digits than its factorization.

123815854108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347797436 (or 347797434 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 46.

The spelling of 123815854108 in words is "one hundred twenty-three billion, eight hundred fifteen million, eight hundred fifty-four thousand, one hundred eight".