123152521673740 has 96 divisors (see below), whose sum is σ = 279956621952000. Its totient is φ = 45236801778432.

The previous prime is 123152521673737. The next prime is 123152521673749. The reversal of 123152521673740 is 47376125251321.

It is not an unprimeable number, because it can be changed into a prime (123152521673749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37535001 + ... + 40683919.

It is an arithmetic number, because the mean of its divisors is an integer number (2916214812000).

Almost surely, 2^{123152521673740} is an apocalyptic number.

123152521673740 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 123152521673740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139978310976000).

123152521673740 is an abundant number, since it is smaller than the sum of its proper divisors (156804100278260).

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

123152521673740 is a wasteful number, since it uses less digits than its factorization.

123152521673740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3149719 (or 3149717 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 49.

The spelling of 123152521673740 in words is "one hundred twenty-three trillion, one hundred fifty-two billion, five hundred twenty-one million, six hundred seventy-three thousand, seven hundred forty".