68571207720 has 96 divisors (see below), whose sum is σ = 231110399520. Its totient is φ = 18285652800.

The previous prime is 68571207713. The next prime is 68571207737. The reversal of 68571207720 is 2770217586.

68571207720 is a `hidden beast` number, since 6 + 8 + 571 + 2 + 0 + 7 + 72 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3517606 + ... + 3537045.

It is an arithmetic number, because the mean of its divisors is an integer number (2407399995).

Almost surely, 2^68571207720 is an apocalyptic number.

68571207720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68571207720 is an abundant number, since it is smaller than the sum of its proper divisors (162539191800).

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

68571207720 is a wasteful number, since it uses less digits than its factorization.

68571207720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7054677 (or 7054661 counting only the distinct ones).

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

The spelling of 68571207720 in words is "sixty-eight billion, five hundred seventy-one million, two hundred seven thousand, seven hundred twenty".