2749051857 has 4 divisors (see below), whose sum is σ = 3665402480. Its totient is φ = 1832701236.

The previous prime is 2749051849. The next prime is 2749051873. The reversal of 2749051857 is 7581509472.

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 not a de Polignac number, because 2749051857 - 2³ = 2749051849 is a prime.

It is a super-2 number, since 2×2749051857² = 15114572224950296898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2749051807) 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, 458175307 + ... + 458175312.

It is an arithmetic number, because the mean of its divisors is an integer number (916350620).

Almost surely, 2^2749051857 is an apocalyptic number.

It is an amenable number.

2749051857 is a deficient number, since it is larger than the sum of its proper divisors (916350623).

2749051857 is an equidigital number, since it uses as much as digits as its factorization.

2749051857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916350622.

The product of its (nonzero) digits is 705600, while the sum is 48.

The square root of 2749051857 is about 52431.4014403582. The cubic root of 2749051857 is about 1400.8586326389.

The spelling of 2749051857 in words is "two billion, seven hundred forty-nine million, fifty-one thousand, eight hundred fifty-seven".