12157243500 has 48 divisors (see below), whose sum is σ = 35401897440. Its totient is φ = 3241931200.

The previous prime is 12157243487. The next prime is 12157243517. The reversal of 12157243500 is 534275121.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 4050915 + ... + 4053914.

It is an arithmetic number, because the mean of its divisors is an integer number (737539530).

Almost surely, 2^12157243500 is an apocalyptic number.

12157243500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12157243500 is an abundant number, since it is smaller than the sum of its proper divisors (23244653940).

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

12157243500 is a wasteful number, since it uses less digits than its factorization.

12157243500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8104851 (or 8104839 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The spelling of 12157243500 in words is "twelve billion, one hundred fifty-seven million, two hundred forty-three thousand, five hundred".