1641463205 has 4 divisors (see below), whose sum is σ = 1969755852. Its totient is φ = 1313170560.

The previous prime is 1641463193. The next prime is 1641463231. The reversal of 1641463205 is 5023641461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 995591809 + 645871396 = 31553^2 + 25414^2 .

It is not a de Polignac number, because 1641463205 - 2⁶ = 1641463141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164146316 + ... + 164146325.

It is an arithmetic number, because the mean of its divisors is an integer number (492438963).

Almost surely, 2^1641463205 is an apocalyptic number.

It is an amenable number.

1641463205 is a deficient number, since it is larger than the sum of its proper divisors (328292647).

1641463205 is an equidigital number, since it uses as much as digits as its factorization.

1641463205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328292646.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 1641463205 is about 40514.9750709537. The cubic root of 1641463205 is about 1179.6243190249.

The spelling of 1641463205 in words is "one billion, six hundred forty-one million, four hundred sixty-three thousand, two hundred five".