12378035889 has 6 divisors (see below), whose sum is σ = 17879385186. Its totient is φ = 8252023920.

The previous prime is 12378035863. The next prime is 12378035897. The reversal of 12378035889 is 98853087321.

It can be written as a sum of positive squares in only one way, i.e., 7642256400 + 4735779489 = 87420^2 + 68817^2 .

It is not a de Polignac number, because 12378035889 - 2¹¹ = 12378033841 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12378035689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 687668652 + ... + 687668669.

It is an arithmetic number, because the mean of its divisors is an integer number (2979897531).

Almost surely, 2^12378035889 is an apocalyptic number.

It is an amenable number.

12378035889 is a deficient number, since it is larger than the sum of its proper divisors (5501349297).

12378035889 is a wasteful number, since it uses less digits than its factorization.

12378035889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375337327 (or 1375337324 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 12378035889 in words is "twelve billion, three hundred seventy-eight million, thirty-five thousand, eight hundred eighty-nine".