12540961507684 has 27 divisors (see below), whose sum is σ = 21979714363243. Its totient is φ = 6261057296000.

The previous prime is 12540961507567. The next prime is 12540961507729. The reversal of 12540961507684 is 48670516904521.

The square root of 12540961507684 is 3541322.

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

It can be written as a sum of positive squares in 4 ways, for example, as 10028482901284 + 2512478606400 = 3166778^2 + 1585080^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9214519164 + ... + 9214520524.

Almost surely, 2^{12540961507684} is an apocalyptic number.

12540961507684 is the 3541322-nd square number.

It is an amenable number.

12540961507684 is a deficient number, since it is larger than the sum of its proper divisors (9438752855559).

12540961507684 is an frugal number, since it uses more digits than its factorization.

12540961507684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5328 (or 2664 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 58.

The spelling of 12540961507684 in words is "twelve trillion, five hundred forty billion, nine hundred sixty-one million, five hundred seven thousand, six hundred eighty-four".