6164564326621 has 4 divisors (see below), whose sum is σ = 6164574553852. Its totient is φ = 6164554099392.

The previous prime is 6164564326601. The next prime is 6164564326637. The reversal of 6164564326621 is 1266234654616.

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 4753424655225 + 1411139671396 = 2180235^2 + 1187914^2 .

It is a cyclic number.

It is not a de Polignac number, because 6164564326621 - 2¹⁷ = 6164564195549 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 (6164564326601) 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, 4148796 + ... + 5435221.

It is an arithmetic number, because the mean of its divisors is an integer number (1541143638463).

Almost surely, 2^{6164564326621} is an apocalyptic number.

It is an amenable number.

6164564326621 is a deficient number, since it is larger than the sum of its proper divisors (10227231).

6164564326621 is an equidigital number, since it uses as much as digits as its factorization.

6164564326621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10227230.

The product of its digits is 7464960, while the sum is 52.

The spelling of 6164564326621 in words is "six trillion, one hundred sixty-four billion, five hundred sixty-four million, three hundred twenty-six thousand, six hundred twenty-one".