12187370805 has 64 divisors (see below), whose sum is σ = 20983795200. Its totient is φ = 6018195456.

The previous prime is 12187370803. The next prime is 12187370809. The reversal of 12187370805 is 50807378121.

12187370805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12187370805 - 2¹ = 12187370803 is a prime.

It is a super-4 number, since 4×12187370805⁴ (a number of 41 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12187370803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11149839 + ... + 11150931.

It is an arithmetic number, because the mean of its divisors is an integer number (327871800).

Almost surely, 2^12187370805 is an apocalyptic number.

12187370805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12187370805 is a deficient number, since it is larger than the sum of its proper divisors (8796424395).

12187370805 is a wasteful number, since it uses less digits than its factorization.

12187370805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790.

The product of its (nonzero) digits is 94080, while the sum is 42.

The spelling of 12187370805 in words is "twelve billion, one hundred eighty-seven million, three hundred seventy thousand, eight hundred five".