2643410645 has 8 divisors (see below), whose sum is σ = 3175961400. Its totient is φ = 2112149440.

The previous prime is 2643410629. The next prime is 2643410657. The reversal of 2643410645 is 5460143462.

It can be written as a sum of positive squares in 4 ways, for example, as 6280036 + 2637130609 = 2506^2 + 51353^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2643410645 - 2⁴ = 2643410629 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317870 + ... + 326079.

It is an arithmetic number, because the mean of its divisors is an integer number (396995175).

Almost surely, 2^2643410645 is an apocalyptic number.

It is an amenable number.

2643410645 is a deficient number, since it is larger than the sum of its proper divisors (532550755).

2643410645 is an equidigital number, since it uses as much as digits as its factorization.

2643410645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644775.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 2643410645 is about 51414.1093961570. The cubic root of 2643410645 is about 1382.6795666596.

The spelling of 2643410645 in words is "two billion, six hundred forty-three million, four hundred ten thousand, six hundred forty-five".