68178864 has 80 divisors (see below), whose sum is σ = 194869472. Its totient is φ = 20404224.

The previous prime is 68178853. The next prime is 68178871. The reversal of 68178864 is 46887186.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21612 + ... + 24564.

Almost surely, 2^68178864 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 68178864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97434736).

68178864 is an abundant number, since it is smaller than the sum of its proper divisors (126690608).

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

68178864 is a wasteful number, since it uses less digits than its factorization.

68178864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014 (or 3008 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The square root of 68178864 is about 8257.0493519174. The cubic root of 68178864 is about 408.5230699887.

The spelling of 68178864 in words is "sixty-eight million, one hundred seventy-eight thousand, eight hundred sixty-four".