12398987845 has 8 divisors (see below), whose sum is σ = 15391847160. Its totient is φ = 9577149120.

The previous prime is 12398987807. The next prime is 12398987879. The reversal of 12398987845 is 54878989321.

It can be written as a sum of positive squares in 4 ways, for example, as 2178182241 + 10220805604 = 46671^2 + 101098^2 .

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

It is not a de Polignac number, because 12398987845 - 2⁹ = 12398987333 is a prime.

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, 42754986 + ... + 42755275.

It is an arithmetic number, because the mean of its divisors is an integer number (1923980895).

Almost surely, 2^12398987845 is an apocalyptic number.

It is an amenable number.

12398987845 is a deficient number, since it is larger than the sum of its proper divisors (2992859315).

12398987845 is an equidigital number, since it uses as much as digits as its factorization.

12398987845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85510295.

The product of its digits is 34836480, while the sum is 64.

The spelling of 12398987845 in words is "twelve billion, three hundred ninety-eight million, nine hundred eighty-seven thousand, eight hundred forty-five".