12408971433769 has 3 divisors (see below), whose sum is σ = 12408974956407. Its totient is φ = 12408967911132.

The previous prime is 12408971433667. The next prime is 12408971433959. The reversal of 12408971433769 is 96733417980421.

The square root of 12408971433769 is 3522637.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 10842498912025 + 1566472521744 = 3292795^2 + 1251588^2 .

It is not a de Polignac number, because 12408971433769 - 2¹³ = 12408971425577 is a prime.

It is a super-2 number, since 2×12408971433769² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12408971433769.

It is not an unprimeable number, because it can be changed into a prime (12408971443769) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1761319 + ... + 5283955.

It is an arithmetic number, because the mean of its divisors is an integer number (4136324985469).

Almost surely, 2^{12408971433769} is an apocalyptic number.

12408971433769 is the 3522637-th square number.

12408971433769 is the 1761319-th centered octagonal number.

It is an amenable number.

12408971433769 is a deficient number, since it is larger than the sum of its proper divisors (3522638).

12408971433769 is an frugal number, since it uses more digits than its factorization.

12408971433769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7045274 (or 3522637 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 64.

Multiplying 12408971433769 by its sum of digits (64), we get a square (794174171761216 = 28181096²).

The spelling of 12408971433769 in words is "twelve trillion, four hundred eight billion, nine hundred seventy-one million, four hundred thirty-three thousand, seven hundred sixty-nine".