12185890455 has 16 divisors (see below), whose sum is σ = 19912264704. Its totient is φ = 6360861600.

The previous prime is 12185890441. The next prime is 12185890459. The reversal of 12185890455 is 55409858121.

It is not a de Polignac number, because 12185890455 - 2⁶ = 12185890391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12185890459) 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, 8641771 + ... + 8643180.

It is an arithmetic number, because the mean of its divisors is an integer number (1244516544).

Almost surely, 2^12185890455 is an apocalyptic number.

12185890455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12185890455 is a deficient number, since it is larger than the sum of its proper divisors (7726374249).

12185890455 is a wasteful number, since it uses less digits than its factorization.

12185890455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17285006.

The product of its (nonzero) digits is 576000, while the sum is 48.

The spelling of 12185890455 in words is "twelve billion, one hundred eighty-five million, eight hundred ninety thousand, four hundred fifty-five".