68851074539520 has 2240 divisors, whose sum is σ = 307051672790016. Its totient is φ = 14370943795200.

The previous prime is 68851074539497. The next prime is 68851074539521. The reversal of 68851074539520 is 2593547015886.

68851074539520 is a `hidden beast` number, since 6 + 8 + 8 + 5 + 1 + 0 + 74 + 5 + 39 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (2240).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (68851074539521) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 29285866345 + ... + 29285868695.

It is a 1-persistent number, because it is pandigital, but 2⋅68851074539520 = 137702149079040 is not.

Almost surely, 2^{68851074539520} is an apocalyptic number.

68851074539520 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 68851074539520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153525836395008).

68851074539520 is an abundant number, since it is smaller than the sum of its proper divisors (238200598250496).

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

68851074539520 is a wasteful number, since it uses less digits than its factorization.

68851074539520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511 (or 2478 counting only the distinct ones).

The product of its (nonzero) digits is 72576000, while the sum is 63.

The spelling of 68851074539520 in words is "sixty-eight trillion, eight hundred fifty-one billion, seventy-four million, five hundred thirty-nine thousand, five hundred twenty".