68013377680 has 60 divisors (see below), whose sum is σ = 160527342780. Its totient is φ = 26799159552.

The previous prime is 68013377647. The next prime is 68013377741. The reversal of 68013377680 is 8677331086.

It can be written as a sum of positive squares in 2 ways, for example, as 45166450576 + 22846927104 = 212524^2 + 151152^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264426 + ... + 453814.

It is an arithmetic number, because the mean of its divisors is an integer number (2675455713).

Almost surely, 2^68013377680 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 68013377680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80263671390).

68013377680 is an abundant number, since it is smaller than the sum of its proper divisors (92513965100).

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

68013377680 is a wasteful number, since it uses less digits than its factorization.

68013377680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189536 (or 189463 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 68013377680 in words is "sixty-eight billion, thirteen million, three hundred seventy-seven thousand, six hundred eighty".