12617968543684 has 81 divisors (see below), whose sum is σ = 25788930365709. Its totient is φ = 5386238544960.

The previous prime is 12617968543669. The next prime is 12617968543711. The reversal of 12617968543684 is 48634586971621.

The square root of 12617968543684 is 3552178.

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

It can be written as a sum of positive squares in only one way, i.e., 3618448537284 + 8999520006400 = 1902222^2 + 2999920^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 24218749344 + ... + 24218749864.

Almost surely, 2^{12617968543684} is an apocalyptic number.

12617968543684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12617968543684 is the 3552178-th square number.

It is an amenable number.

12617968543684 is an abundant number, since it is smaller than the sum of its proper divisors (13170961822025).

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

12617968543684 is an frugal number, since it uses more digits than its factorization.

12617968543684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034 (or 1017 counting only the distinct ones).

The product of its digits is 418037760, while the sum is 70.

The spelling of 12617968543684 in words is "twelve trillion, six hundred seventeen billion, nine hundred sixty-eight million, five hundred forty-three thousand, six hundred eighty-four".