123556557375 has 48 divisors (see below), whose sum is σ = 224065348416. Its totient is φ = 65502139200.

The previous prime is 123556557323. The next prime is 123556557391. The reversal of 123556557375 is 573755655321.

123556557375 is a `hidden beast` number, since 1 + 2 + 3 + 5 + 5 + 65 + 573 + 7 + 5 = 666.

It is not a de Polignac number, because 123556557375 - 2¹¹ = 123556555327 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 140952 + ... + 516701.

It is an arithmetic number, because the mean of its divisors is an integer number (4668028092).

Almost surely, 2^123556557375 is an apocalyptic number.

123556557375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123556557375 is a deficient number, since it is larger than the sum of its proper divisors (100508791041).

123556557375 is a wasteful number, since it uses less digits than its factorization.

123556557375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657841 (or 657828 counting only the distinct ones).

The product of its digits is 16537500, while the sum is 54.

The spelling of 123556557375 in words is "one hundred twenty-three billion, five hundred fifty-six million, five hundred fifty-seven thousand, three hundred seventy-five".