12157149720 has 192 divisors, whose sum is σ = 38504885760. Its totient is φ = 3069208320.

The previous prime is 12157149671. The next prime is 12157149733. The reversal of 12157149720 is 2794175121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5418919 + ... + 5421161.

It is an arithmetic number, because the mean of its divisors is an integer number (200546280).

Almost surely, 2^12157149720 is an apocalyptic number.

12157149720 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 12157149720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19252442880).

12157149720 is an abundant number, since it is smaller than the sum of its proper divisors (26347736040).

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

12157149720 is a wasteful number, since it uses less digits than its factorization.

12157149720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366 (or 2331 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The spelling of 12157149720 in words is "twelve billion, one hundred fifty-seven million, one hundred forty-nine thousand, seven hundred twenty".