123815854078 has 64 divisors (see below), whose sum is σ = 230809098240. Its totient is φ = 48606064128.

The previous prime is 123815854073. The next prime is 123815854109. The reversal of 123815854078 is 870458518321.

123815854078 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1971376 + ... + 2033212.

It is an arithmetic number, because the mean of its divisors is an integer number (3606392160).

Almost surely, 2^123815854078 is an apocalyptic number.

123815854078 is a deficient number, since it is larger than the sum of its proper divisors (106993244162).

123815854078 is a wasteful number, since it uses less digits than its factorization.

123815854078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62089.

The product of its (nonzero) digits is 2150400, while the sum is 52.

The spelling of 123815854078 in words is "one hundred twenty-three billion, eight hundred fifteen million, eight hundred fifty-four thousand, seventy-eight".