2185411643 has 16 divisors (see below), whose sum is σ = 2269723680. Its totient is φ = 2102707200.

The previous prime is 2185411621. The next prime is 2185411691. The reversal of 2185411643 is 3461145812.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2185411643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2185411603) 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, 2776496 + ... + 2777282.

It is an arithmetic number, because the mean of its divisors is an integer number (141857730).

Almost surely, 2^2185411643 is an apocalyptic number.

2185411643 is a deficient number, since it is larger than the sum of its proper divisors (84312037).

2185411643 is an equidigital number, since it uses as much as digits as its factorization.

2185411643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678.

The product of its digits is 23040, while the sum is 35.

The square root of 2185411643 is about 46748.3865283070. The cubic root of 2185411643 is about 1297.7102975006.

The spelling of 2185411643 in words is "two billion, one hundred eighty-five million, four hundred eleven thousand, six hundred forty-three".