641705833659 has 16 divisors (see below), whose sum is σ = 933495220224. Its totient is φ = 388868911200.

The previous prime is 641705833649. The next prime is 641705833679. The reversal of 641705833659 is 956338507146.

It is not a de Polignac number, because 641705833659 - 2¹⁵ = 641705800891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 641705833599 and 641705833608.

It is not an unprimeable number, because it can be changed into a prime (641705833649) 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, 793627 + ... + 1383204.

It is an arithmetic number, because the mean of its divisors is an integer number (58343451264).

Almost surely, 2^641705833659 is an apocalyptic number.

641705833659 is a deficient number, since it is larger than the sum of its proper divisors (291789386565).

641705833659 is a wasteful number, since it uses less digits than its factorization.

641705833659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185778.

The product of its (nonzero) digits is 16329600, while the sum is 57.

The spelling of 641705833659 in words is "six hundred forty-one billion, seven hundred five million, eight hundred thirty-three thousand, six hundred fifty-nine".