2745251257 has 4 divisors (see below), whose sum is σ = 3137430016. Its totient is φ = 2353072500.

The previous prime is 2745251237. The next prime is 2745251261. The reversal of 2745251257 is 7521525472.

2745251257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2745251257 - 2¹⁹ = 2744726969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2745251237) 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, 196089369 + ... + 196089382.

It is an arithmetic number, because the mean of its divisors is an integer number (784357504).

Almost surely, 2^2745251257 is an apocalyptic number.

It is an amenable number.

2745251257 is a deficient number, since it is larger than the sum of its proper divisors (392178759).

2745251257 is an equidigital number, since it uses as much as digits as its factorization.

2745251257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392178758.

The product of its digits is 196000, while the sum is 40.

The square root of 2745251257 is about 52395.1453571798. The cubic root of 2745251257 is about 1400.2127664725.

The spelling of 2745251257 in words is "two billion, seven hundred forty-five million, two hundred fifty-one thousand, two hundred fifty-seven".