2643453645 has 16 divisors (see below), whose sum is σ = 4833744000. Its totient is φ = 1208435904.

The previous prime is 2643453629. The next prime is 2643453647. The reversal of 2643453645 is 5463543462.

It is a happy number.

It is not a de Polignac number, because 2643453645 - 2⁴ = 2643453629 is a prime.

It is a super-3 number, since 3×2643453645³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2643453597 and 2643453606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643453647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12587770 + ... + 12587979.

It is an arithmetic number, because the mean of its divisors is an integer number (302109000).

Almost surely, 2^2643453645 is an apocalyptic number.

It is an amenable number.

2643453645 is a deficient number, since it is larger than the sum of its proper divisors (2190290355).

2643453645 is a wasteful number, since it uses less digits than its factorization.

2643453645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25175764.

The product of its digits is 1036800, while the sum is 42.

The square root of 2643453645 is about 51414.5275676049. The cubic root of 2643453645 is about 1382.6870639055.

The spelling of 2643453645 in words is "two billion, six hundred forty-three million, four hundred fifty-three thousand, six hundred forty-five".