2185665554913 has 8 divisors (see below), whose sum is σ = 2920799118048. Its totient is φ = 1453821180864.

The previous prime is 2185665554899. The next prime is 2185665554951. The reversal of 2185665554913 is 3194555665812.

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

It is not a de Polignac number, because 2185665554913 - 2¹³ = 2185665546721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2185665554713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 822295720 + ... + 822298377.

It is an arithmetic number, because the mean of its divisors is an integer number (365099889756).

Almost surely, 2^{2185665554913} is an apocalyptic number.

It is an amenable number.

2185665554913 is a deficient number, since it is larger than the sum of its proper divisors (735133563135).

2185665554913 is a wasteful number, since it uses less digits than its factorization.

2185665554913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644594543.

The product of its digits is 38880000, while the sum is 60.

The spelling of 2185665554913 in words is "two trillion, one hundred eighty-five billion, six hundred sixty-five million, five hundred fifty-four thousand, nine hundred thirteen".