12791709902500 has 135 divisors (see below), whose sum is σ = 28185289677237. Its totient is φ = 5078128752000.

The previous prime is 12791709902467. The next prime is 12791709902519. The reversal of 12791709902500 is 520990719721.

It is a happy number.

The square root of 12791709902500 is 3576550.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 12364914238884 + 426795663616 = 3516378^2 + 653296^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 41666807347 + ... + 41666807653.

Almost surely, 2^{12791709902500} is an apocalyptic number.

12791709902500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12791709902500 is the 3576550-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12791709902500

12791709902500 is an abundant number, since it is smaller than the sum of its proper divisors (15393579774737).

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

12791709902500 is an frugal number, since it uses more digits than its factorization.

12791709902500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 714420, while the sum is 52.

The spelling of 12791709902500 in words is "twelve trillion, seven hundred ninety-one billion, seven hundred nine million, nine hundred two thousand, five hundred".