12599734500 has 72 divisors (see below), whose sum is σ = 39747976632. Its totient is φ = 3359928000.

The previous prime is 12599734463. The next prime is 12599734529. The reversal of 12599734500 is 543799521.

It is a happy number.

12599734500 is a `hidden beast` number, since 1 + 2 + 59 + 97 + 3 + 4 + 500 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 868245156 + 11731489344 = 29466^2 + 108312^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1395471 + ... + 1404470.

It is an arithmetic number, because the mean of its divisors is an integer number (552055231).

Almost surely, 2^12599734500 is an apocalyptic number.

12599734500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12599734500 is an abundant number, since it is smaller than the sum of its proper divisors (27148242132).

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

12599734500 is a wasteful number, since it uses less digits than its factorization.

12599734500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2799966 (or 2799951 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 12599734500 in words is "twelve billion, five hundred ninety-nine million, seven hundred thirty-four thousand, five hundred".