641162205 has 24 divisors (see below), whose sum is σ = 1115381592. Its totient is φ = 340712064.

The previous prime is 641162161. The next prime is 641162213. The reversal of 641162205 is 502261146.

641162205 is a `hidden beast` number, since 641 + 16 + 2 + 2 + 0 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 122279364 + 518882841 = 11058^2 + 22779^2 .

It is not a de Polignac number, because 641162205 - 2¹² = 641158109 is a prime.

It is a super-2 number, since 2×641162205² = 822177946240924050, which contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 13254 + ... + 38183.

It is an arithmetic number, because the mean of its divisors is an integer number (46474233).

Almost surely, 2^641162205 is an apocalyptic number.

It is an amenable number.

641162205 is a deficient number, since it is larger than the sum of its proper divisors (474219387).

641162205 is a wasteful number, since it uses less digits than its factorization.

641162205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51725 (or 51722 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 641162205 is about 25321.1809558717. The cubic root of 641162205 is about 862.2952053150.

The spelling of 641162205 in words is "six hundred forty-one million, one hundred sixty-two thousand, two hundred five".