641935808 has 14 divisors (see below), whose sum is σ = 1273841496. Its totient is φ = 320967872.

The previous prime is 641935799. The next prime is 641935813. The reversal of 641935808 is 808539146.

It is a super-2 number, since 2×641935808² = 824163163185225728, 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5015060 + ... + 5015187.

Almost surely, 2^641935808 is an apocalyptic number.

It is an amenable number.

641935808 is a deficient number, since it is larger than the sum of its proper divisors (631905688).

641935808 is a wasteful number, since it uses less digits than its factorization.

641935808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10030259 (or 10030249 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 641935808 is about 25336.4521588955. The cubic root of 641935808 is about 862.6418706066.

The spelling of 641935808 in words is "six hundred forty-one million, nine hundred thirty-five thousand, eight hundred eight".