68112776820 has 192 divisors, whose sum is σ = 214527833856. Its totient is φ = 16001925120.

The previous prime is 68112776773. The next prime is 68112776833. The reversal of 68112776820 is 2867721186.

It is a super-2 number, since 2×68112776820² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68112776820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6270514 + ... + 6281366.

It is an arithmetic number, because the mean of its divisors is an integer number (1117332468).

Almost surely, 2^68112776820 is an apocalyptic number.

68112776820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68112776820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107263916928).

68112776820 is an abundant number, since it is smaller than the sum of its proper divisors (146415057036).

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

68112776820 is a wasteful number, since it uses less digits than its factorization.

68112776820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11170 (or 11168 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The spelling of 68112776820 in words is "sixty-eight billion, one hundred twelve million, seven hundred seventy-six thousand, eight hundred twenty".