2645724609623 has 4 divisors (see below), whose sum is σ = 2645729809080. Its totient is φ = 2645719410168.

The previous prime is 2645724609589. The next prime is 2645724609629. The reversal of 2645724609623 is 3269064275462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2645724609623 - 2¹⁶ = 2645724544087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645724609629) 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, 1742165 + ... + 2885582.

It is an arithmetic number, because the mean of its divisors is an integer number (661432452270).

Almost surely, 2^{2645724609623} is an apocalyptic number.

2645724609623 is a deficient number, since it is larger than the sum of its proper divisors (5199457).

2645724609623 is an equidigital number, since it uses as much as digits as its factorization.

2645724609623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5199456.

The product of its (nonzero) digits is 26127360, while the sum is 56.

The spelling of 2645724609623 in words is "two trillion, six hundred forty-five billion, seven hundred twenty-four million, six hundred nine thousand, six hundred twenty-three".