2544879949 has 4 divisors (see below), whose sum is σ = 2632634460. Its totient is φ = 2457125440.

The previous prime is 2544879947. The next prime is 2544879979. The reversal of 2544879949 is 9499784452.

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 1560803049 + 984076900 = 39507^2 + 31370^2 .

It is a cyclic number.

It is not a de Polignac number, because 2544879949 - 2¹ = 2544879947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2544879947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43877212 + ... + 43877269.

It is an arithmetic number, because the mean of its divisors is an integer number (658158615).

Almost surely, 2^2544879949 is an apocalyptic number.

2544879949 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2544879949 is a deficient number, since it is larger than the sum of its proper divisors (87754511).

2544879949 is an equidigital number, since it uses as much as digits as its factorization.

2544879949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87754510.

The product of its digits is 26127360, while the sum is 61.

The square root of 2544879949 is about 50446.8031593678. The cubic root of 2544879949 is about 1365.2822163769.

The spelling of 2544879949 in words is "two billion, five hundred forty-four million, eight hundred seventy-nine thousand, nine hundred forty-nine".