641682139309 has 16 divisors (see below), whose sum is σ = 666792403200. Its totient is φ = 616774023936.

The previous prime is 641682139303. The next prime is 641682139361. The reversal of 641682139309 is 903931286146.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 641682139309 - 2¹⁹ = 641681615021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641682139303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11328352 + ... + 11384854.

It is an arithmetic number, because the mean of its divisors is an integer number (41674525200).

Almost surely, 2^641682139309 is an apocalyptic number.

It is an amenable number.

641682139309 is a deficient number, since it is larger than the sum of its proper divisors (25110263891).

641682139309 is a wasteful number, since it uses less digits than its factorization.

641682139309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58284.

The product of its (nonzero) digits is 1679616, while the sum is 52.

The spelling of 641682139309 in words is "six hundred forty-one billion, six hundred eighty-two million, one hundred thirty-nine thousand, three hundred nine".