2745263891 has 8 divisors (see below), whose sum is σ = 2752023264. Its totient is φ = 2738514240.

The previous prime is 2745263881. The next prime is 2745263897. The reversal of 2745263891 is 1983625472.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2745263891 - 2⁶ = 2745263827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2745263897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 980105 + ... + 982901.

It is an arithmetic number, because the mean of its divisors is an integer number (344002908).

Almost surely, 2^2745263891 is an apocalyptic number.

2745263891 is a deficient number, since it is larger than the sum of its proper divisors (6759373).

2745263891 is a wasteful number, since it uses less digits than its factorization.

2745263891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4861.

The product of its digits is 725760, while the sum is 47.

The square root of 2745263891 is about 52395.2659216460. The cubic root of 2745263891 is about 1400.2149144557.

The spelling of 2745263891 in words is "two billion, seven hundred forty-five million, two hundred sixty-three thousand, eight hundred ninety-one".