68781798767 has 16 divisors (see below), whose sum is σ = 75417315840. Its totient is φ = 62210534400.

The previous prime is 68781798739. The next prime is 68781798791. The reversal of 68781798767 is 76789718786.

It is a cyclic number.

It is not a de Polignac number, because 68781798767 - 2⁸ = 68781798511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68781798694 and 68781798703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68781798707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3019892 + ... + 3042582.

It is an arithmetic number, because the mean of its divisors is an integer number (4713582240).

Almost surely, 2^68781798767 is an apocalyptic number.

68781798767 is a deficient number, since it is larger than the sum of its proper divisors (6635517073).

68781798767 is a wasteful number, since it uses less digits than its factorization.

68781798767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24094.

The product of its digits is 398297088, while the sum is 74.

The spelling of 68781798767 in words is "sixty-eight billion, seven hundred eighty-one million, seven hundred ninety-eight thousand, seven hundred sixty-seven".