12181664734 has 16 divisors (see below), whose sum is σ = 19224068976. Its totient is φ = 5781672000.

The previous prime is 12181664723. The next prime is 12181664773. The reversal of 12181664734 is 43746618121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2004492 + ... + 2010559.

It is an arithmetic number, because the mean of its divisors is an integer number (1201504311).

Almost surely, 2^12181664734 is an apocalyptic number.

12181664734 is a deficient number, since it is larger than the sum of its proper divisors (7042404242).

12181664734 is a wasteful number, since it uses less digits than its factorization.

12181664734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4015131.

The product of its digits is 193536, while the sum is 43.

The spelling of 12181664734 in words is "twelve billion, one hundred eighty-one million, six hundred sixty-four thousand, seven hundred thirty-four".