68559909215680 has 56 divisors (see below), whose sum is σ = 164843315780832. Its totient is φ = 27157711598592.

The previous prime is 68559909215647. The next prime is 68559909215687. The reversal of 68559909215680 is 8651290995586.

68559909215680 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 2×68559909215680² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68559909215687) 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, 1040014207 + ... + 1040080126.

Almost surely, 2^{68559909215680} is an apocalyptic number.

It is an amenable number.

68559909215680 is an abundant number, since it is smaller than the sum of its proper divisors (96283406565152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68559909215680 is a wasteful number, since it uses less digits than its factorization.

68559909215680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080094453 (or 2080094443 counting only the distinct ones).

The product of its (nonzero) digits is 419904000, while the sum is 73.

The spelling of 68559909215680 in words is "sixty-eight trillion, five hundred fifty-nine billion, nine hundred nine million, two hundred fifteen thousand, six hundred eighty".