680368391887 has 8 divisors (see below), whose sum is σ = 720397552896. Its totient is φ = 640340063232.

The previous prime is 680368391831. The next prime is 680368391893. The reversal of 680368391887 is 788193863086.

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

It is a cyclic number.

It is not a de Polignac number, because 680368391887 - 2¹¹ = 680368389839 is a prime.

It is a super-2 number, since 2×680368391887² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680368398887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2431743 + ... + 2697055.

It is an arithmetic number, because the mean of its divisors is an integer number (90049694112).

Almost surely, 2^680368391887 is an apocalyptic number.

680368391887 is a deficient number, since it is larger than the sum of its proper divisors (40029161009).

680368391887 is a wasteful number, since it uses less digits than its factorization.

680368391887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416177.

The product of its (nonzero) digits is 83607552, while the sum is 67.

The spelling of 680368391887 in words is "six hundred eighty billion, three hundred sixty-eight million, three hundred ninety-one thousand, eight hundred eighty-seven".