68545540608 has 320 divisors, whose sum is σ = 212412119040. Its totient is φ = 19483656192.

The previous prime is 68545540597. The next prime is 68545540633. The reversal of 68545540608 is 80604554586.

68545540608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×68545540608² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11407941 + ... + 11413947.

It is an arithmetic number, because the mean of its divisors is an integer number (663787872).

Almost surely, 2^68545540608 is an apocalyptic number.

68545540608 is a gapful number since it is divisible by the number (68) 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 68545540608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106206059520).

68545540608 is an abundant number, since it is smaller than the sum of its proper divisors (143866578432).

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

68545540608 is a wasteful number, since it uses less digits than its factorization.

68545540608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6087 (or 6071 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 51.

The spelling of 68545540608 in words is "sixty-eight billion, five hundred forty-five million, five hundred forty thousand, six hundred eight".