68210757720 has 480 divisors, whose sum is σ = 280743764400. Its totient is φ = 14769796608.

The previous prime is 68210757709. The next prime is 68210757751. The reversal of 68210757720 is 2775701286.

68210757720 is a `hidden beast` number, since 68 + 2 + 10 + 7 + 577 + 2 + 0 = 666.

68210757720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 3005134 + ... + 3027746.

Almost surely, 2^68210757720 is an apocalyptic number.

68210757720 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 68210757720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140371882200).

68210757720 is an abundant number, since it is smaller than the sum of its proper divisors (212533006680).

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

68210757720 is a wasteful number, since it uses less digits than its factorization.

68210757720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22669 (or 22649 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The spelling of 68210757720 in words is "sixty-eight billion, two hundred ten million, seven hundred fifty-seven thousand, seven hundred twenty".