12170487890 has 16 divisors (see below), whose sum is σ = 23898412800. Its totient is φ = 4425631920.

The previous prime is 12170487883. The next prime is 12170487961. The reversal of 12170487890 is 9878407121.

It is a happy number.

12170487890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55320290 + ... + 55320509.

It is an arithmetic number, because the mean of its divisors is an integer number (1493650800).

Almost surely, 2^12170487890 is an apocalyptic number.

12170487890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12170487890 is a deficient number, since it is larger than the sum of its proper divisors (11727924910).

12170487890 is a wasteful number, since it uses less digits than its factorization.

12170487890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110640817.

The product of its (nonzero) digits is 225792, while the sum is 47.

The spelling of 12170487890 in words is "twelve billion, one hundred seventy million, four hundred eighty-seven thousand, eight hundred ninety".