68820164784 has 200 divisors, whose sum is σ = 239622282240. Its totient is φ = 18627967872.

The previous prime is 68820164767. The next prime is 68820164797. The reversal of 68820164784 is 48746102886.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

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 68820164784.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27264 + ... + 371999.

Almost surely, 2^68820164784 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 68820164784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119811141120).

68820164784 is an abundant number, since it is smaller than the sum of its proper divisors (170802117456).

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

68820164784 is a wasteful number, since it uses less digits than its factorization.

68820164784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399309 (or 399294 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 68820164784 in words is "sixty-eight billion, eight hundred twenty million, one hundred sixty-four thousand, seven hundred eighty-four".