2646022621 has 4 divisors (see below), whose sum is σ = 2886570144. Its totient is φ = 2405475100.

The previous prime is 2646022597. The next prime is 2646022651. The reversal of 2646022621 is 1262206462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2646022621 - 2⁷ = 2646022493 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646022651) 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, 120273745 + ... + 120273766.

It is an arithmetic number, because the mean of its divisors is an integer number (721642536).

Almost surely, 2^2646022621 is an apocalyptic number.

It is an amenable number.

2646022621 is a deficient number, since it is larger than the sum of its proper divisors (240547523).

2646022621 is a wasteful number, since it uses less digits than its factorization.

2646022621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240547522.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 2646022621 is about 51439.5044785620. The cubic root of 2646022621 is about 1383.1348291286.

The spelling of 2646022621 in words is "two billion, six hundred forty-six million, twenty-two thousand, six hundred twenty-one".