2638846745 has 4 divisors (see below), whose sum is σ = 3166616100. Its totient is φ = 2111077392.

The previous prime is 2638846723. The next prime is 2638846757. The reversal of 2638846745 is 5476488362.

It is a happy number.

2638846745 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.

It can be written as a sum of positive squares in 2 ways, for example, as 597704704 + 2041142041 = 24448^2 + 45179^2 .

It is a cyclic number.

It is not a de Polignac number, because 2638846745 - 2⁶ = 2638846681 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263884670 + ... + 263884679.

It is an arithmetic number, because the mean of its divisors is an integer number (791654025).

Almost surely, 2^2638846745 is an apocalyptic number.

It is an amenable number.

2638846745 is a deficient number, since it is larger than the sum of its proper divisors (527769355).

2638846745 is an equidigital number, since it uses as much as digits as its factorization.

2638846745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527769354.

The product of its digits is 7741440, while the sum is 53.

The square root of 2638846745 is about 51369.7064912775. The cubic root of 2638846745 is about 1381.8833671920.

The spelling of 2638846745 in words is "two billion, six hundred thirty-eight million, eight hundred forty-six thousand, seven hundred forty-five".