68709841920 has 352 divisors, whose sum is σ = 245129068800. Its totient is φ = 18251661312.

The previous prime is 68709841901. The next prime is 68709841927. The reversal of 68709841920 is 2914890786.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68709841927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42438871 + ... + 42440489.

It is an arithmetic number, because the mean of its divisors is an integer number (696389400).

Almost surely, 2^68709841920 is an apocalyptic number.

68709841920 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 68709841920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122564534400).

68709841920 is an abundant number, since it is smaller than the sum of its proper divisors (176419226880).

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

68709841920 is a wasteful number, since it uses less digits than its factorization.

68709841920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960 (or 1936 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 68709841920 in words is "sixty-eight billion, seven hundred nine million, eight hundred forty-one thousand, nine hundred twenty".