2745971549 has 4 divisors (see below), whose sum is σ = 2765726880. Its totient is φ = 2726216220.

The previous prime is 2745971533. The next prime is 2745971609. The reversal of 2745971549 is 9451795472.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2745971549 - 2⁴ = 2745971533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2745971549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2745971149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9877457 + ... + 9877734.

It is an arithmetic number, because the mean of its divisors is an integer number (691431720).

Almost surely, 2^2745971549 is an apocalyptic number.

It is an amenable number.

2745971549 is a deficient number, since it is larger than the sum of its proper divisors (19755331).

2745971549 is a wasteful number, since it uses less digits than its factorization.

2745971549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19755330.

The product of its digits is 3175200, while the sum is 53.

The square root of 2745971549 is about 52402.0185584487. The cubic root of 2745971549 is about 1400.3352171779.

The spelling of 2745971549 in words is "two billion, seven hundred forty-five million, nine hundred seventy-one thousand, five hundred forty-nine".