2185553215187 has 4 divisors (see below), whose sum is σ = 2195097115920. Its totient is φ = 2176009314456.

The previous prime is 2185553215177. The next prime is 2185553215193. The reversal of 2185553215187 is 7815123555812.

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

It is a cyclic number.

It is not a de Polignac number, because 2185553215187 - 2³² = 2181258247891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2185553215117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4771950023 + ... + 4771950480.

It is an arithmetic number, because the mean of its divisors is an integer number (548774278980).

Almost surely, 2^{2185553215187} is an apocalyptic number.

2185553215187 is a deficient number, since it is larger than the sum of its proper divisors (9543900733).

2185553215187 is an equidigital number, since it uses as much as digits as its factorization.

2185553215187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9543900732.

The product of its digits is 3360000, while the sum is 53.

The spelling of 2185553215187 in words is "two trillion, one hundred eighty-five billion, five hundred fifty-three million, two hundred fifteen thousand, one hundred eighty-seven".