12146728881 has 32 divisors (see below), whose sum is σ = 19763251200. Its totient is φ = 6484794624.

The previous prime is 12146728859. The next prime is 12146728897. The reversal of 12146728881 is 18882764121.

It is not a de Polignac number, because 12146728881 - 2⁶ = 12146728817 is a prime.

It is a super-2 number, since 2×12146728881² (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 12146728881.

It is not an unprimeable number, because it can be changed into a prime (12146728831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 271656 + ... + 313193.

It is an arithmetic number, because the mean of its divisors is an integer number (617601600).

Almost surely, 2^12146728881 is an apocalyptic number.

It is an amenable number.

12146728881 is a deficient number, since it is larger than the sum of its proper divisors (7616522319).

12146728881 is a wasteful number, since it uses less digits than its factorization.

12146728881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584925.

The product of its digits is 344064, while the sum is 48.

The spelling of 12146728881 in words is "twelve billion, one hundred forty-six million, seven hundred twenty-eight thousand, eight hundred eighty-one".