12181129546 has 8 divisors (see below), whose sum is σ = 18347511204. Its totient is φ = 6065292480.

The previous prime is 12181129531. The next prime is 12181129547. The reversal of 12181129546 is 64592118121.

It can be written as a sum of positive squares in 2 ways, for example, as 11499345225 + 681784321 = 107235^2 + 26111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12181129546² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12181129499 and 12181129508.

It is not an unprimeable number, because it can be changed into a prime (12181129547) 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, 12635545 + ... + 12636508.

Almost surely, 2^12181129546 is an apocalyptic number.

12181129546 is a deficient number, since it is larger than the sum of its proper divisors (6166381658).

12181129546 is a wasteful number, since it uses less digits than its factorization.

12181129546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25272296.

The product of its digits is 34560, while the sum is 40.

The spelling of 12181129546 in words is "twelve billion, one hundred eighty-one million, one hundred twenty-nine thousand, five hundred forty-six".