12167999989 has 4 divisors (see below), whose sum is σ = 12304719180. Its totient is φ = 12031280800.

The previous prime is 12167999983. The next prime is 12167999993. The reversal of 12167999989 is 98999976121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8512830225 + 3655169764 = 92265^2 + 60458^2 .

It is a cyclic number.

It is not a de Polignac number, because 12167999989 - 2¹⁵ = 12167967221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12167999983) 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 3 ways as a sum of consecutive naturals, for example, 68359462 + ... + 68359639.

It is an arithmetic number, because the mean of its divisors is an integer number (3076179795).

Almost surely, 2^12167999989 is an apocalyptic number.

It is an amenable number.

12167999989 is a deficient number, since it is larger than the sum of its proper divisors (136719191).

12167999989 is an equidigital number, since it uses as much as digits as its factorization.

12167999989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136719190.

The product of its digits is 39680928, while the sum is 70.

The spelling of 12167999989 in words is "twelve billion, one hundred sixty-seven million, nine hundred ninety-nine thousand, nine hundred eighty-nine".