12621845809422 has 24 divisors (see below), whose sum is σ = 27387967580064. Its totient is φ = 4201030399104.

The previous prime is 12621845809393. The next prime is 12621845809427. The reversal of 12621845809422 is 22490854812621.

It is a happy number.

12621845809422 is a `hidden beast` number, since 1 + 2 + 6 + 2 + 18 + 4 + 580 + 9 + 42 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621845809427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 520948998 + ... + 520973225.

It is an arithmetic number, because the mean of its divisors is an integer number (1141165315836).

Almost surely, 2^{12621845809422} is an apocalyptic number.

12621845809422 is an abundant number, since it is smaller than the sum of its proper divisors (14766121770642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12621845809422 is a wasteful number, since it uses less digits than its factorization.

12621845809422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041922904 (or 1041922901 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 12621845809422 in words is "twelve trillion, six hundred twenty-one billion, eight hundred forty-five million, eight hundred nine thousand, four hundred twenty-two".