2705672981449 has 3 divisors (see below), whose sum is σ = 2705674626343. Its totient is φ = 2705671336556.

The previous prime is 2705672981443. The next prime is 2705672981503. The reversal of 2705672981449 is 9441892765072.

The square root of 2705672981449 is 1644893.

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., 2696673044025 + 8999937424 = 1642155^2 + 94868^2 .

It is not a de Polignac number, because 2705672981449 - 2⁹ = 2705672980937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2705672981443) 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, 822447 + ... + 2467339.

Almost surely, 2^{2705672981449} is an apocalyptic number.

2705672981449 is the 1644893-rd square number.

2705672981449 is the 822447-th centered octagonal number.

It is an amenable number.

2705672981449 is a deficient number, since it is larger than the sum of its proper divisors (1644894).

2705672981449 is an frugal number, since it uses more digits than its factorization.

2705672981449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3289786 (or 1644893 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 64.

Multiplying 2705672981449 by its sum of digits (64), we get a square (173163070812736 = 13159144²).

The spelling of 2705672981449 in words is "two trillion, seven hundred five billion, six hundred seventy-two million, nine hundred eighty-one thousand, four hundred forty-nine".