12180987964 has 12 divisors (see below), whose sum is σ = 21317535904. Its totient is φ = 6090263424.

The previous prime is 12180987961. The next prime is 12180987983. The reversal of 12180987964 is 46978908121.

It is a happy number.

It is a super-2 number, since 2×12180987964² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12180987961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126829 + ... + 201115.

Almost surely, 2^12180987964 is an apocalyptic number.

It is an amenable number.

12180987964 is a deficient number, since it is larger than the sum of its proper divisors (9136547940).

12180987964 is a wasteful number, since it uses less digits than its factorization.

12180987964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115284 (or 115282 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 12180987964 in words is "twelve billion, one hundred eighty million, nine hundred eighty-seven thousand, nine hundred sixty-four".