12011172658 has 16 divisors (see below), whose sum is σ = 18972162720. Its totient is φ = 5687356896.

The previous prime is 12011172637. The next prime is 12011172683. The reversal of 12011172658 is 85627111021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44841 + ... + 161347.

It is an arithmetic number, because the mean of its divisors is an integer number (1185760170).

Almost surely, 2^12011172658 is an apocalyptic number.

12011172658 is a deficient number, since it is larger than the sum of its proper divisors (6960990062).

12011172658 is a wasteful number, since it uses less digits than its factorization.

12011172658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119241.

The product of its (nonzero) digits is 6720, while the sum is 34.

Adding to 12011172658 its reverse (85627111021), we get a palindrome (97638283679).

The spelling of 12011172658 in words is "twelve billion, eleven million, one hundred seventy-two thousand, six hundred fifty-eight".