12140659728 has 50 divisors (see below), whose sum is σ = 35138595294. Its totient is φ = 4046886144.

The previous prime is 12140659709. The next prime is 12140659753. The reversal of 12140659728 is 82795604121.

12140659728 is a `hidden beast` number, since 12 + 1 + 40 + 6 + 597 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8048242944 + 4092416784 = 89712^2 + 63972^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4682601 + ... + 4685192.

Almost surely, 2^12140659728 is an apocalyptic number.

12140659728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12140659728 is an abundant number, since it is smaller than the sum of its proper divisors (22997935566).

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

12140659728 is an equidigital number, since it uses as much as digits as its factorization.

12140659728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9367813 (or 9367798 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 12140659728 in words is "twelve billion, one hundred forty million, six hundred fifty-nine thousand, seven hundred twenty-eight".