2749621849 has 24 divisors (see below), whose sum is σ = 3092638920. Its totient is φ = 2429844480.

The previous prime is 2749621843. The next prime is 2749621867. The reversal of 2749621849 is 9481269472.

It can be written as a sum of positive squares in 4 ways, for example, as 37295449 + 2712326400 = 6107^2 + 52080^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2749621849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2749621796 and 2749621805.

It is not an unprimeable number, because it can be changed into a prime (2749621843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1210687 + ... + 1212955.

It is an arithmetic number, because the mean of its divisors is an integer number (128859955).

Almost surely, 2^2749621849 is an apocalyptic number.

It is an amenable number.

2749621849 is a deficient number, since it is larger than the sum of its proper divisors (343017071).

2749621849 is a wasteful number, since it uses less digits than its factorization.

2749621849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441 (or 2410 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 52.

The square root of 2749621849 is about 52436.8367562346. The cubic root of 2749621849 is about 1400.9554445673.

The spelling of 2749621849 in words is "two billion, seven hundred forty-nine million, six hundred twenty-one thousand, eight hundred forty-nine".