641387308 has 6 divisors (see below), whose sum is σ = 1122427796. Its totient is φ = 320693652.

The previous prime is 641387273. The next prime is 641387309. The reversal of 641387308 is 803783146.

641387308 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641387308² = 822755357726973728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641387309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80173410 + ... + 80173417.

Almost surely, 2^641387308 is an apocalyptic number.

It is an amenable number.

641387308 is a deficient number, since it is larger than the sum of its proper divisors (481040488).

641387308 is a wasteful number, since it uses less digits than its factorization.

641387308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160346831 (or 160346829 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 641387308 is about 25325.6255204092. The cubic root of 641387308 is about 862.3961067326.

The spelling of 641387308 in words is "six hundred forty-one million, three hundred eighty-seven thousand, three hundred eight".