68491000560 has 80 divisors (see below), whose sum is σ = 219643575840. Its totient is φ = 17634462720.

The previous prime is 68491000553. The next prime is 68491000561. The reversal of 68491000560 is 6500019486.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68491000561) 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, 4913371 + ... + 4927290.

It is an arithmetic number, because the mean of its divisors is an integer number (2745544698).

Almost surely, 2^68491000560 is an apocalyptic number.

68491000560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68491000560 is an abundant number, since it is smaller than the sum of its proper divisors (151152575280).

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

68491000560 is a wasteful number, since it uses less digits than its factorization.

68491000560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9840706 (or 9840700 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 68491000560 in words is "sixty-eight billion, four hundred ninety-one million, five hundred sixty", and thus it is an aban number.