12158332972 has 18 divisors (see below), whose sum is σ = 21433655852. Its totient is φ = 6034755744.

The previous prime is 12158332961. The next prime is 12158332973. The reversal of 12158332972 is 27923385121.

It is not an unprimeable number, because it can be changed into a prime (12158332973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5898 + ... + 156049.

Almost surely, 2^12158332972 is an apocalyptic number.

It is an amenable number.

12158332972 is a deficient number, since it is larger than the sum of its proper divisors (9275322880).

12158332972 is a wasteful number, since it uses less digits than its factorization.

12158332972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162225 (or 162086 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The spelling of 12158332972 in words is "twelve billion, one hundred fifty-eight million, three hundred thirty-two thousand, nine hundred seventy-two".