641644546 has 16 divisors (see below), whose sum is σ = 1004970240. Its totient is φ = 306861520.

The previous prime is 641644477. The next prime is 641644571. The reversal of 641644546 is 645446146.

It is a super-2 number, since 2×641644546² = 823415446823092232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641644499 and 641644508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45490 + ... + 57901.

It is an arithmetic number, because the mean of its divisors is an integer number (62810640).

Almost surely, 2^641644546 is an apocalyptic number.

641644546 is a deficient number, since it is larger than the sum of its proper divisors (363325694).

641644546 is a wasteful number, since it uses less digits than its factorization.

641644546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103529.

The product of its digits is 276480, while the sum is 40.

The square root of 641644546 is about 25330.7036222842. The cubic root of 641644546 is about 862.5113836207.

The spelling of 641644546 in words is "six hundred forty-one million, six hundred forty-four thousand, five hundred forty-six".