68207727840 has 384 divisors, whose sum is σ = 249789173760. Its totient is φ = 15322963968.

The previous prime is 68207727827. The next prime is 68207727851. The reversal of 68207727840 is 4872770286.

It is a super-2 number, since 2×68207727840² (a number of 22 digits) contains 22 as substring.

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, 77773482 + ... + 77774358.

It is an arithmetic number, because the mean of its divisors is an integer number (650492640).

Almost surely, 2^68207727840 is an apocalyptic number.

68207727840 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 68207727840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124894586880).

68207727840 is an abundant number, since it is smaller than the sum of its proper divisors (181581445920).

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

68207727840 is a wasteful number, since it uses less digits than its factorization.

68207727840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1266 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 51.

The spelling of 68207727840 in words is "sixty-eight billion, two hundred seven million, seven hundred twenty-seven thousand, eight hundred forty".