13622426721 has 8 divisors (see below), whose sum is σ = 20181372960. Its totient is φ = 9081617796.

The previous prime is 13622426717. The next prime is 13622426759. The reversal of 13622426721 is 12762422631.

13622426721 is a `hidden beast` number, since 1 + 3 + 622 + 4 + 2 + 6 + 7 + 21 = 666.

It is not a de Polignac number, because 13622426721 - 2² = 13622426717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13622426711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252267135 + ... + 252267188.

It is an arithmetic number, because the mean of its divisors is an integer number (2522671620).

Almost surely, 2^13622426721 is an apocalyptic number.

It is an amenable number.

13622426721 is a deficient number, since it is larger than the sum of its proper divisors (6558946239).

13622426721 is an equidigital number, since it uses as much as digits as its factorization.

13622426721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504534332 (or 504534326 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The spelling of 13622426721 in words is "thirteen billion, six hundred twenty-two million, four hundred twenty-six thousand, seven hundred twenty-one".