68239691520 has 1152 divisors, whose sum is σ = 300448770048. Its totient is φ = 12740198400.

The previous prime is 68239691489. The next prime is 68239691567. The reversal of 68239691520 is 2519693286.

68239691520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 157597224 + ... + 157597656.

It is an arithmetic number, because the mean of its divisors is an integer number (260806224).

Almost surely, 2^68239691520 is an apocalyptic number.

68239691520 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 68239691520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150224385024).

68239691520 is an abundant number, since it is smaller than the sum of its proper divisors (232209078528).

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

68239691520 is a wasteful number, since it uses less digits than its factorization.

68239691520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 68239691520 in words is "sixty-eight billion, two hundred thirty-nine million, six hundred ninety-one thousand, five hundred twenty".