13215166643 has 16 divisors (see below), whose sum is σ = 15162033600. Its totient is φ = 11283117696.

The previous prime is 13215166639. The next prime is 13215166663. The reversal of 13215166643 is 34666151231.

It is a cyclic number.

It is not a de Polignac number, because 13215166643 - 2² = 13215166639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13215166597 and 13215166606.

It is not an unprimeable number, because it can be changed into a prime (13215166633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3019805 + ... + 3024177.

It is an arithmetic number, because the mean of its divisors is an integer number (947627100).

Almost surely, 2^13215166643 is an apocalyptic number.

13215166643 is a deficient number, since it is larger than the sum of its proper divisors (1946866957).

13215166643 is a wasteful number, since it uses less digits than its factorization.

13215166643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5966.

The product of its digits is 77760, while the sum is 38.

The spelling of 13215166643 in words is "thirteen billion, two hundred fifteen million, one hundred sixty-six thousand, six hundred forty-three".