641907686859 has 8 divisors (see below), whose sum is σ = 857187602832. Its totient is φ = 427283114400.

The previous prime is 641907686839. The next prime is 641907686879. The reversal of 641907686859 is 958686709146.

It is an interprime number because it is at equal distance from previous prime (641907686839) and next prime (641907686879).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 641907686859 - 2⁷ = 641907686731 is a prime.

It is a super-3 number, since 3×641907686859³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641907686793 and 641907686802.

It is not an unprimeable number, because it can be changed into a prime (641907686839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163833592 + ... + 163837509.

It is an arithmetic number, because the mean of its divisors is an integer number (107148450354).

Almost surely, 2^641907686859 is an apocalyptic number.

641907686859 is a deficient number, since it is larger than the sum of its proper divisors (215279915973).

641907686859 is a wasteful number, since it uses less digits than its factorization.

641907686859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327671757.

The product of its (nonzero) digits is 156764160, while the sum is 69.

The spelling of 641907686859 in words is "six hundred forty-one billion, nine hundred seven million, six hundred eighty-six thousand, eight hundred fifty-nine".