12357517128 has 64 divisors (see below), whose sum is σ = 34254861120. Its totient is φ = 3683308800.

The previous prime is 12357517111. The next prime is 12357517129. The reversal of 12357517128 is 82171575321.

It is a self number, because there is not a number n which added to its sum of digits gives 12357517128.

It is not an unprimeable number, because it can be changed into a prime (12357517129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367575 + ... + 399782.

It is an arithmetic number, because the mean of its divisors is an integer number (535232205).

Almost surely, 2^12357517128 is an apocalyptic number.

It is an amenable number.

12357517128 is an abundant number, since it is smaller than the sum of its proper divisors (21897343992).

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

12357517128 is a wasteful number, since it uses less digits than its factorization.

12357517128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767438 (or 767434 counting only the distinct ones).

The product of its digits is 117600, while the sum is 42.

The spelling of 12357517128 in words is "twelve billion, three hundred fifty-seven million, five hundred seventeen thousand, one hundred twenty-eight".