2622636643 has 6 divisors (see below), whose sum is σ = 2882732972. Its totient is φ = 2384215020.

The previous prime is 2622636629. The next prime is 2622636647. The reversal of 2622636643 is 3466362262.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2622636643 is a prime.

It is a super-2 number, since 2×2622636643² = 13756445922412618898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2622636596 and 2622636605.

It is not an unprimeable number, because it can be changed into a prime (2622636647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10837221 + ... + 10837462.

Almost surely, 2^2622636643 is an apocalyptic number.

2622636643 is a deficient number, since it is larger than the sum of its proper divisors (260096329).

2622636643 is a wasteful number, since it uses less digits than its factorization.

2622636643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21674705 (or 21674694 counting only the distinct ones).

The product of its digits is 373248, while the sum is 40.

The square root of 2622636643 is about 51211.6846334897. The cubic root of 2622636643 is about 1379.0479751397.

The spelling of 2622636643 in words is "two billion, six hundred twenty-two million, six hundred thirty-six thousand, six hundred forty-three".