12549218105 has 16 divisors (see below), whose sum is σ = 15134246400. Its totient is φ = 9989376192.

The previous prime is 12549218093. The next prime is 12549218113. The reversal of 12549218105 is 50181294521.

It is a cyclic number.

It is not a de Polignac number, because 12549218105 - 2⁴ = 12549218089 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 842432 + ... + 857198.

It is an arithmetic number, because the mean of its divisors is an integer number (945890400).

Almost surely, 2^12549218105 is an apocalyptic number.

It is an amenable number.

12549218105 is a deficient number, since it is larger than the sum of its proper divisors (2585028295).

12549218105 is a wasteful number, since it uses less digits than its factorization.

12549218105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15608.

The product of its (nonzero) digits is 28800, while the sum is 38.

The spelling of 12549218105 in words is "twelve billion, five hundred forty-nine million, two hundred eighteen thousand, one hundred five".