2621446016621 has 4 divisors (see below), whose sum is σ = 2631646195932. Its totient is φ = 2611245837312.

The previous prime is 2621446016611. The next prime is 2621446016647. The reversal of 2621446016621 is 1266106441262.

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 2074504418596 + 546941598025 = 1440314^2 + 739555^2 .

It is a cyclic number.

It is not a de Polignac number, because 2621446016621 - 2²² = 2621441822317 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 (2621446016611) 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 3 ways as a sum of consecutive naturals, for example, 5100089270 + ... + 5100089783.

It is an arithmetic number, because the mean of its divisors is an integer number (657911548983).

Almost surely, 2^{2621446016621} is an apocalyptic number.

It is an amenable number.

2621446016621 is a deficient number, since it is larger than the sum of its proper divisors (10200179311).

2621446016621 is a wasteful number, since it uses less digits than its factorization.

2621446016621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10200179310.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 2621446016621 in words is "two trillion, six hundred twenty-one billion, four hundred forty-six million, sixteen thousand, six hundred twenty-one".