2751980449 has 4 divisors (see below), whose sum is σ = 2756817540. Its totient is φ = 2747143360.

The previous prime is 2751980447. The next prime is 2751980461. The reversal of 2751980449 is 9440891572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1775105424 + 976875025 = 42132^2 + 31255^2 .

It is a cyclic number.

It is not a de Polignac number, because 2751980449 - 2¹ = 2751980447 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2751980447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2417692 + ... + 2418829.

It is an arithmetic number, because the mean of its divisors is an integer number (689204385).

Almost surely, 2^2751980449 is an apocalyptic number.

It is an amenable number.

2751980449 is a deficient number, since it is larger than the sum of its proper divisors (4837091).

2751980449 is an equidigital number, since it uses as much as digits as its factorization.

2751980449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4837090.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 2751980449 is about 52459.3218503633. The cubic root of 2751980449 is about 1401.3559055938.

The spelling of 2751980449 in words is "two billion, seven hundred fifty-one million, nine hundred eighty thousand, four hundred forty-nine".