641642104 has 16 divisors (see below), whose sum is σ = 1209728520. Its totient is φ = 319047840.

The previous prime is 641642083. The next prime is 641642117. The reversal of 641642104 is 401246146.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220114 + ... + 223009.

Almost surely, 2^641642104 is an apocalyptic number.

It is an amenable number.

641642104 is a deficient number, since it is larger than the sum of its proper divisors (568086416).

641642104 is a wasteful number, since it uses less digits than its factorization.

641642104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443310 (or 443306 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 641642104 is about 25330.6554198663. The cubic root of 641642104 is about 862.5102894243.

The spelling of 641642104 in words is "six hundred forty-one million, six hundred forty-two thousand, one hundred four".