2185036491 has 16 divisors (see below), whose sum is σ = 3189479040. Its totient is φ = 1319579520.

The previous prime is 2185036471. The next prime is 2185036507. The reversal of 2185036491 is 1946305812.

It is not a de Polignac number, because 2185036491 - 2¹⁰ = 2185035467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2185036421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107646 + ... + 126323.

It is an arithmetic number, because the mean of its divisors is an integer number (199342440).

Almost surely, 2^2185036491 is an apocalyptic number.

2185036491 is a deficient number, since it is larger than the sum of its proper divisors (1004442549).

2185036491 is a wasteful number, since it uses less digits than its factorization.

2185036491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234266.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 2185036491 is about 46744.3738967590. The cubic root of 2185036491 is about 1297.6360374293.

The spelling of 2185036491 in words is "two billion, one hundred eighty-five million, thirty-six thousand, four hundred ninety-one".