12890187892069 has 4 divisors (see below), whose sum is σ = 13035021463980. Its totient is φ = 12745354320160.

The previous prime is 12890187892063. The next prime is 12890187892151. The reversal of 12890187892069 is 96029878109821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6278347069569 + 6611840822500 = 2505663^2 + 2571350^2 .

It is a cyclic number.

It is not a de Polignac number, because 12890187892069 - 2³ = 12890187892061 is a prime.

It is a super-2 number, since 2×12890187892069² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12890187891989 and 12890187892007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12890187892061) 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, 72416785822 + ... + 72416785999.

It is an arithmetic number, because the mean of its divisors is an integer number (3258755365995).

Almost surely, 2^{12890187892069} is an apocalyptic number.

It is an amenable number.

12890187892069 is a deficient number, since it is larger than the sum of its proper divisors (144833571911).

12890187892069 is an equidigital number, since it uses as much as digits as its factorization.

12890187892069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144833571910.

The product of its (nonzero) digits is 62705664, while the sum is 70.

The spelling of 12890187892069 in words is "twelve trillion, eight hundred ninety billion, one hundred eighty-seven million, eight hundred ninety-two thousand, sixty-nine".