123520188788 has 6 divisors (see below), whose sum is σ = 216160330386. Its totient is φ = 61760094392.

The previous prime is 123520188767. The next prime is 123520188829. The reversal of 123520188788 is 887881025321.

It can be written as a sum of positive squares in only one way, i.e., 122975059684 + 545129104 = 350678^2 + 23348^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15440023595 + ... + 15440023602.

It is an arithmetic number, because the mean of its divisors is an integer number (36026721731).

Almost surely, 2^123520188788 is an apocalyptic number.

It is an amenable number.

123520188788 is a deficient number, since it is larger than the sum of its proper divisors (92640141598).

123520188788 is a wasteful number, since it uses less digits than its factorization.

123520188788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30880047201 (or 30880047199 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 53.

The spelling of 123520188788 in words is "one hundred twenty-three billion, five hundred twenty million, one hundred eighty-eight thousand, seven hundred eighty-eight".