12139291505 has 16 divisors (see below), whose sum is σ = 16048784448. Its totient is φ = 8741160000.

The previous prime is 12139291499. The next prime is 12139291513. The reversal of 12139291505 is 50519293121.

It is not a de Polignac number, because 12139291505 - 2⁶ = 12139291441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 1087091 + ... + 1098200.

It is an arithmetic number, because the mean of its divisors is an integer number (1003049028).

Almost surely, 2^12139291505 is an apocalyptic number.

It is an amenable number.

12139291505 is a deficient number, since it is larger than the sum of its proper divisors (3909492943).

12139291505 is a wasteful number, since it uses less digits than its factorization.

12139291505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185408.

The product of its (nonzero) digits is 24300, while the sum is 38.

The spelling of 12139291505 in words is "twelve billion, one hundred thirty-nine million, two hundred ninety-one thousand, five hundred five".