641042445 has 16 divisors (see below), whose sum is σ = 1036244160. Its totient is φ = 338363904.

The previous prime is 641042431. The next prime is 641042491. The reversal of 641042445 is 544240146.

It is a happy number.

It is not a de Polignac number, because 641042445 - 2⁴ = 641042429 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, 218835 + ... + 221744.

It is an arithmetic number, because the mean of its divisors is an integer number (64765260).

Almost surely, 2^641042445 is an apocalyptic number.

It is an amenable number.

641042445 is a deficient number, since it is larger than the sum of its proper divisors (395201715).

641042445 is a wasteful number, since it uses less digits than its factorization.

641042445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440684.

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 641042445 is about 25318.8160268208. The cubic root of 641042445 is about 862.2415138033.

The spelling of 641042445 in words is "six hundred forty-one million, forty-two thousand, four hundred forty-five".