123888515970 has 32 divisors (see below), whose sum is σ = 300276331200. Its totient is φ = 32709838400.

The previous prime is 123888515917. The next prime is 123888515987. The reversal of 123888515970 is 79515888321.

It is a self number, because there is not a number n which added to its sum of digits gives 123888515970.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20440620 + ... + 20446679.

It is an arithmetic number, because the mean of its divisors is an integer number (9383635350).

Almost surely, 2^123888515970 is an apocalyptic number.

123888515970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123888515970 is an abundant number, since it is smaller than the sum of its proper divisors (176387815230).

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

123888515970 is a wasteful number, since it uses less digits than its factorization.

123888515970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40887410.

The product of its (nonzero) digits is 4838400, while the sum is 57.

The spelling of 123888515970 in words is "one hundred twenty-three billion, eight hundred eighty-eight million, five hundred fifteen thousand, nine hundred seventy".