68399892777 has 4 divisors (see below), whose sum is σ = 91199857040. Its totient is φ = 45599928516.

The previous prime is 68399892731. The next prime is 68399892779. The reversal of 68399892777 is 77729899386.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68399892777 - 2⁸ = 68399892521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68399892699 and 68399892708.

It is not an unprimeable number, because it can be changed into a prime (68399892779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11399982127 + ... + 11399982132.

It is an arithmetic number, because the mean of its divisors is an integer number (22799964260).

Almost surely, 2^68399892777 is an apocalyptic number.

It is an amenable number.

68399892777 is a deficient number, since it is larger than the sum of its proper divisors (22799964263).

68399892777 is a wasteful number, since it uses less digits than its factorization.

68399892777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22799964262.

The product of its digits is 576108288, while the sum is 75.

The spelling of 68399892777 in words is "sixty-eight billion, three hundred ninety-nine million, eight hundred ninety-two thousand, seven hundred seventy-seven".