2645332563621 has 16 divisors (see below), whose sum is σ = 3885853059648. Its totient is φ = 1587358272000.

The previous prime is 2645332563581. The next prime is 2645332563707. The reversal of 2645332563621 is 1263652335462.

It is not a de Polignac number, because 2645332563621 - 2¹⁷ = 2645332432549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645332563121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396836236 + ... + 396842901.

It is an arithmetic number, because the mean of its divisors is an integer number (242865816228).

Almost surely, 2^{2645332563621} is an apocalyptic number.

It is an amenable number.

2645332563621 is a deficient number, since it is larger than the sum of its proper divisors (1240520496027).

2645332563621 is a wasteful number, since it uses less digits than its factorization.

2645332563621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793679252.

The product of its digits is 4665600, while the sum is 48.

The spelling of 2645332563621 in words is "two trillion, six hundred forty-five billion, three hundred thirty-two million, five hundred sixty-three thousand, six hundred twenty-one".