68865743520 has 144 divisors (see below), whose sum is σ = 268576439040. Its totient is φ = 15740739072.

The previous prime is 68865743497. The next prime is 68865743537. The reversal of 68865743520 is 2534756886.

68865743520 is a `hidden beast` number, since 68 + 8 + 6 + 57 + 4 + 3 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3405880 + ... + 3426039.

It is an arithmetic number, because the mean of its divisors is an integer number (1865114160).

Almost surely, 2^68865743520 is an apocalyptic number.

68865743520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68865743520 is an abundant number, since it is smaller than the sum of its proper divisors (199710695520).

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

68865743520 is a wasteful number, since it uses less digits than its factorization.

68865743520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6831947 (or 6831936 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 68865743520 in words is "sixty-eight billion, eight hundred sixty-five million, seven hundred forty-three thousand, five hundred twenty".