12126185808 has 80 divisors (see below), whose sum is σ = 34189478400. Its totient is φ = 3672915840.

The previous prime is 12126185801. The next prime is 12126185843. The reversal of 12126185808 is 80858162121.

It is a super-2 number, since 2×12126185808² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12126185808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12126185801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1621983 + ... + 1629441.

It is an arithmetic number, because the mean of its divisors is an integer number (427368480).

Almost surely, 2^12126185808 is an apocalyptic number.

It is an amenable number.

12126185808 is an abundant number, since it is smaller than the sum of its proper divisors (22063292592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12126185808 is a wasteful number, since it uses less digits than its factorization.

12126185808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10560 (or 10554 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 42.

The spelling of 12126185808 in words is "twelve billion, one hundred twenty-six million, one hundred eighty-five thousand, eight hundred eight".