7622111621 has 2 divisors, whose sum is σ = 7622111622. Its totient is φ = 7622111620.

The previous prime is 7622111603. The next prime is 7622111633. The reversal of 7622111621 is 1261112267.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7193414596 + 428697025 = 84814^2 + 20705^2 .

It is a cyclic number.

It is not a de Polignac number, because 7622111621 - 2¹⁰ = 7622110597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7622111921) 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 as a sum of consecutive naturals, namely, 3811055810 + 3811055811.

It is an arithmetic number, because the mean of its divisors is an integer number (3811055811).

Almost surely, 2^7622111621 is an apocalyptic number.

It is an amenable number.

7622111621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7622111621 is an equidigital number, since it uses as much as digits as its factorization.

7622111621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

The square root of 7622111621 is about 87304.7056062845. The cubic root of 7622111621 is about 1968.0000334794. Note that the first 4 decimals are identical.

Adding to 7622111621 its reverse (1261112267), we get a palindrome (8883223888).

The spelling of 7622111621 in words is "seven billion, six hundred twenty-two million, one hundred eleven thousand, six hundred twenty-one".