13164206555621 has 12 divisors (see below), whose sum is σ = 14470811980800. Its totient is φ = 11966580274440.

The previous prime is 13164206555603. The next prime is 13164206555627. The reversal of 13164206555621 is 12655560246131.

It is a happy number.

It is not a de Polignac number, because 13164206555621 - 2⁴² = 8766160044517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13164206555627) 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, 2346341 + ... + 5642138.

It is an arithmetic number, because the mean of its divisors is an integer number (1205900998400).

Almost surely, 2^{13164206555621} is an apocalyptic number.

13164206555621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13164206555621 is a deficient number, since it is larger than the sum of its proper divisors (1306605425179).

13164206555621 is a wasteful number, since it uses less digits than its factorization.

13164206555621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8002120 (or 8002109 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 13164206555621 in words is "thirteen trillion, one hundred sixty-four billion, two hundred six million, five hundred fifty-five thousand, six hundred twenty-one".