68761019664 has 160 divisors (see below), whose sum is σ = 199933453440. Its totient is φ = 22624178688.

The previous prime is 68761019651. The next prime is 68761019689. The reversal of 68761019664 is 46691016786.

It is a happy number.

68761019664 is a `hidden beast` number, since 6 + 8 + 7 + 610 + 19 + 6 + 6 + 4 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 68761019664.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13541094 + ... + 13546170.

It is an arithmetic number, because the mean of its divisors is an integer number (1249584084).

Almost surely, 2^68761019664 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 68761019664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99966726720).

68761019664 is an abundant number, since it is smaller than the sum of its proper divisors (131172433776).

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

68761019664 is a wasteful number, since it uses less digits than its factorization.

68761019664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5494 (or 5482 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 68761019664 in words is "sixty-eight billion, seven hundred sixty-one million, nineteen thousand, six hundred sixty-four".