2257707645 has 12 divisors (see below), whose sum is σ = 3913359996. Its totient is φ = 1204110720.

The previous prime is 2257707619. The next prime is 2257707671. The reversal of 2257707645 is 5467077522.

2257707645 is a `hidden beast` number, since 2 + 2 + 577 + 0 + 76 + 4 + 5 = 666.

2257707645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2257707619) and next prime (2257707671).

It can be written as a sum of positive squares in 2 ways, for example, as 829094436 + 1428613209 = 28794^2 + 37797^2 .

It is not a de Polignac number, because 2257707645 - 2¹⁰ = 2257706621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 50171281 = 2257707645 / (2 + 2 + 5 + 7 + 7 + 0 + 7 + 6 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 2257707645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25085596 + ... + 25085685.

It is an arithmetic number, because the mean of its divisors is an integer number (326113333).

Almost surely, 2^2257707645 is an apocalyptic number.

It is an amenable number.

2257707645 is a deficient number, since it is larger than the sum of its proper divisors (1655652351).

2257707645 is a wasteful number, since it uses less digits than its factorization.

2257707645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50171292 (or 50171289 counting only the distinct ones).

The product of its (nonzero) digits is 823200, while the sum is 45.

The square root of 2257707645 is about 47515.3411541999. The cubic root of 2257707645 is about 1311.8652691452.

The spelling of 2257707645 in words is "two billion, two hundred fifty-seven million, seven hundred seven thousand, six hundred forty-five".