68505900064 has 192 divisors, whose sum is σ = 166160332800. Its totient is φ = 27172454400.

The previous prime is 68505900061. The next prime is 68505900097. The reversal of 68505900064 is 46000950586.

It is not an unprimeable number, because it can be changed into a prime (68505900061) 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, 21948424 + ... + 21951544.

It is an arithmetic number, because the mean of its divisors is an integer number (865418400).

Almost surely, 2^68505900064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68505900064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83080166400).

68505900064 is an abundant number, since it is smaller than the sum of its proper divisors (97654432736).

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

68505900064 is a wasteful number, since it uses less digits than its factorization.

68505900064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307 (or 3299 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 68505900064 in words is "sixty-eight billion, five hundred five million, nine hundred thousand, sixty-four".