12161886804 has 48 divisors (see below), whose sum is σ = 31668571200. Its totient is φ = 4036251168.

The previous prime is 12161886743. The next prime is 12161886809. The reversal of 12161886804 is 40868816121.

12161886804 is a `hidden beast` number, since 1 + 21 + 618 + 8 + 6 + 8 + 0 + 4 = 666.

It is a super-2 number, since 2×12161886804² (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 12161886804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161886809) 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, 221142 + ... + 270605.

It is an arithmetic number, because the mean of its divisors is an integer number (659761900).

Almost surely, 2^12161886804 is an apocalyptic number.

It is an amenable number.

12161886804 is an abundant number, since it is smaller than the sum of its proper divisors (19506684396).

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

12161886804 is a wasteful number, since it uses less digits than its factorization.

12161886804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491989 (or 491981 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The spelling of 12161886804 in words is "twelve billion, one hundred sixty-one million, eight hundred eighty-six thousand, eight hundred four".