12898889881 has 16 divisors (see below), whose sum is σ = 13114525968. Its totient is φ = 12685312000.

The previous prime is 12898889849. The next prime is 12898889921. The reversal of 12898889881 is 18898889821.

It can be written as a sum of positive squares in 8 ways, for example, as 170537481 + 12728352400 = 13059^2 + 112820^2 .

It is a cyclic number.

It is not a de Polignac number, because 12898889881 - 2⁵ = 12898889849 is a prime.

It is a super-2 number, since 2×12898889881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12898889881.

It is not an unprimeable number, because it can be changed into a prime (12898889981) 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, 16949541 + ... + 16950301.

It is an arithmetic number, because the mean of its divisors is an integer number (819657873).

Almost surely, 2^12898889881 is an apocalyptic number.

It is an amenable number.

12898889881 is a deficient number, since it is larger than the sum of its proper divisors (215636087).

12898889881 is a wasteful number, since it uses less digits than its factorization.

12898889881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772.

The product of its digits is 42467328, while the sum is 70.

The spelling of 12898889881 in words is "twelve billion, eight hundred ninety-eight million, eight hundred eighty-nine thousand, eight hundred eighty-one".