68178912538 has 32 divisors (see below), whose sum is σ = 114213799872. Its totient is φ = 30263184000.

The previous prime is 68178912499. The next prime is 68178912553. The reversal of 68178912538 is 83521987186.

It is a super-2 number, since 2×68178912538² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47956 + ... + 372367.

It is an arithmetic number, because the mean of its divisors is an integer number (3569181246).

Almost surely, 2^68178912538 is an apocalyptic number.

68178912538 is a deficient number, since it is larger than the sum of its proper divisors (46034887334).

68178912538 is a wasteful number, since it uses less digits than its factorization.

68178912538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420510.

The product of its digits is 5806080, while the sum is 58.

The spelling of 68178912538 in words is "sixty-eight billion, one hundred seventy-eight million, nine hundred twelve thousand, five hundred thirty-eight".