1641002205 has 16 divisors (see below), whose sum is σ = 2710301184. Its totient is φ = 846968640.

The previous prime is 1641002191. The next prime is 1641002261. The reversal of 1641002205 is 5022001461.

It is not a de Polignac number, because 1641002205 - 2⁵ = 1641002173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1764054 + ... + 1764983.

It is an arithmetic number, because the mean of its divisors is an integer number (169393824).

Almost surely, 2^1641002205 is an apocalyptic number.

1641002205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1641002205 is a deficient number, since it is larger than the sum of its proper divisors (1069298979).

1641002205 is a wasteful number, since it uses less digits than its factorization.

1641002205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3529076.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1641002205 is about 40509.2854170498. The cubic root of 1641002205 is about 1179.5138773722.

Adding to 1641002205 its reverse (5022001461), we get a palindrome (6663003666).

The spelling of 1641002205 in words is "one billion, six hundred forty-one million, two thousand, two hundred five".