123581913477120 has 2080 divisors, whose sum is σ = 528748996723200. Its totient is φ = 27584918323200.

The previous prime is 123581913477083. The next prime is 123581913477181. The reversal of 123581913477120 is 21774319185321.

123581913477120 is a `hidden beast` number, since 1 + 2 + 3 + 5 + 81 + 91 + 3 + 477 + 1 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 24466818595 + ... + 24466823645.

Almost surely, 2^{123581913477120} is an apocalyptic number.

123581913477120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123581913477120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264374498361600).

123581913477120 is an abundant number, since it is smaller than the sum of its proper divisors (405167083246080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123581913477120 is an frugal number, since it uses more digits than its factorization.

123581913477120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5156 (or 5111 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 123581913477120 in words is "one hundred twenty-three trillion, five hundred eighty-one billion, nine hundred thirteen million, four hundred seventy-seven thousand, one hundred twenty".