123957128880 has 480 divisors, whose sum is σ = 460146173760. Its totient is φ = 29717176320.

The previous prime is 123957128873. The next prime is 123957128903. The reversal of 123957128880 is 88821759321.

123957128880 is a `hidden beast` number, since 1 + 239 + 57 + 1 + 288 + 80 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 61091706 + ... + 61093734.

It is an arithmetic number, because the mean of its divisors is an integer number (958637862).

Almost surely, 2^123957128880 is an apocalyptic number.

123957128880 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 123957128880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230073086880).

123957128880 is an abundant number, since it is smaller than the sum of its proper divisors (336189044880).

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

123957128880 is a wasteful number, since it uses less digits than its factorization.

123957128880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229 (or 2220 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 123957128880 in words is "one hundred twenty-three billion, nine hundred fifty-seven million, one hundred twenty-eight thousand, eight hundred eighty".