68705921580 has 48 divisors (see below), whose sum is σ = 192447790080. Its totient is φ = 18314797248.

The previous prime is 68705921573. The next prime is 68705921623. The reversal of 68705921580 is 8512950786.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47434 + ... + 373713.

It is an arithmetic number, because the mean of its divisors is an integer number (4009328960).

Almost surely, 2^68705921580 is an apocalyptic number.

68705921580 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68705921580 is an abundant number, since it is smaller than the sum of its proper divisors (123741868500).

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

68705921580 is a wasteful number, since it uses less digits than its factorization.

68705921580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423878 (or 423876 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 68705921580 in words is "sixty-eight billion, seven hundred five million, nine hundred twenty-one thousand, five hundred eighty".