68377538816 has 36 divisors (see below), whose sum is σ = 136749216912. Its totient is φ = 34123332096.

The previous prime is 68377538813. The next prime is 68377538849. The reversal of 68377538816 is 61883577386.

It is not an unprimeable number, because it can be changed into a prime (68377538813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121466 + ... + 389241.

Almost surely, 2^68377538816 is an apocalyptic number.

It is an amenable number.

68377538816 is a deficient number, since it is larger than the sum of its proper divisors (68371678096).

68377538816 is an equidigital number, since it uses as much as digits as its factorization.

68377538816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511246 (or 511232 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 62.

The spelling of 68377538816 in words is "sixty-eight billion, three hundred seventy-seven million, five hundred thirty-eight thousand, eight hundred sixteen".