12158995005 has 12 divisors (see below), whose sum is σ = 21075591420. Its totient is φ = 6484797312.

The previous prime is 12158995001. The next prime is 12158995091. The reversal of 12158995005 is 50059985121.

12158995005 is a `hidden beast` number, since 1 + 2 + 1 + 58 + 99 + 500 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6315004089 + 5843990916 = 79467^2 + 76446^2 .

It is not a de Polignac number, because 12158995005 - 2² = 12158995001 is a prime.

It is a super-2 number, since 2×12158995005² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 270199889 = 12158995005 / (1 + 2 + 1 + 5 + 8 + 9 + 9 + 5 + 0 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12158995001) 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 11 ways as a sum of consecutive naturals, for example, 135099900 + ... + 135099989.

It is an arithmetic number, because the mean of its divisors is an integer number (1756299285).

Almost surely, 2^12158995005 is an apocalyptic number.

12158995005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12158995005 is a deficient number, since it is larger than the sum of its proper divisors (8916596415).

12158995005 is a wasteful number, since it uses less digits than its factorization.

12158995005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270199900 (or 270199897 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 45.

The spelling of 12158995005 in words is "twelve billion, one hundred fifty-eight million, nine hundred ninety-five thousand, five".