2185685005390 has 16 divisors (see below), whose sum is σ = 3934437319440. Its totient is φ = 874228600000.

The previous prime is 2185685005367. The next prime is 2185685005393. The reversal of 2185685005390 is 935005865812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185685005393) 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, 5472736 + ... + 5858515.

It is an arithmetic number, because the mean of its divisors is an integer number (245902332465).

Almost surely, 2^{2185685005390} is an apocalyptic number.

2185685005390 is a deficient number, since it is larger than the sum of its proper divisors (1748752314050).

2185685005390 is a wasteful number, since it uses less digits than its factorization.

2185685005390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11350547.

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 2185685005390 in words is "two trillion, one hundred eighty-five billion, six hundred eighty-five million, five thousand, three hundred ninety".