68491000559 has 8 divisors (see below), whose sum is σ = 69037006848. Its totient is φ = 67945099320.

The previous prime is 68491000553. The next prime is 68491000561. The reversal of 68491000559 is 95500019486.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68491000559 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 (68491000553) 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, 1767854 + ... + 1806180.

It is an arithmetic number, because the mean of its divisors is an integer number (8629625856).

Almost surely, 2^68491000559 is an apocalyptic number.

68491000559 is a deficient number, since it is larger than the sum of its proper divisors (546006289).

68491000559 is a wasteful number, since it uses less digits than its factorization.

68491000559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52525.

The product of its (nonzero) digits is 388800, while the sum is 47.

The spelling of 68491000559 in words is "sixty-eight billion, four hundred ninety-one million, five hundred fifty-nine", and thus it is an aban number.