641045605 has 16 divisors (see below), whose sum is σ = 820465200. Its totient is φ = 479137792.

The previous prime is 641045557. The next prime is 641045611. The reversal of 641045605 is 506540146.

It can be written as a sum of positive squares in 8 ways, for example, as 81108036 + 559937569 = 9006^2 + 23663^2 .

It is not a de Polignac number, because 641045605 - 2⁷ = 641045477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15880 + ... + 39169.

It is an arithmetic number, because the mean of its divisors is an integer number (51279075).

Almost surely, 2^641045605 is an apocalyptic number.

It is an amenable number.

641045605 is a deficient number, since it is larger than the sum of its proper divisors (179419595).

641045605 is a wasteful number, since it uses less digits than its factorization.

641045605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55208.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 641045605 is about 25318.8784309258. The cubic root of 641045605 is about 862.2429305991.

The spelling of 641045605 in words is "six hundred forty-one million, forty-five thousand, six hundred five".