68778175076820 has 192 divisors, whose sum is σ = 234915769670400. Its totient is φ = 16567296145920.

The previous prime is 68778175076761. The next prime is 68778175076837. The reversal of 68778175076820 is 2867057187786.

It is a happy number.

68778175076820 is a `hidden beast` number, since 6 + 87 + 7 + 8 + 17 + 507 + 6 + 8 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35942635 + ... + 37807794.

It is an arithmetic number, because the mean of its divisors is an integer number (1223519633700).

Almost surely, 2^{68778175076820} is an apocalyptic number.

68778175076820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68778175076820 is an abundant number, since it is smaller than the sum of its proper divisors (166137594593580).

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

68778175076820 is a wasteful number, since it uses less digits than its factorization.

68778175076820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73750615 (or 73750607 counting only the distinct ones).

The product of its (nonzero) digits is 442552320, while the sum is 72.

The spelling of 68778175076820 in words is "sixty-eight trillion, seven hundred seventy-eight billion, one hundred seventy-five million, seventy-six thousand, eight hundred twenty".