68544451777 has 16 divisors (see below), whose sum is σ = 71828451072. Its totient is φ = 65341918080.

The previous prime is 68544451769. The next prime is 68544451783. The reversal of 68544451777 is 77715444586.

It is a cyclic number.

It is not a de Polignac number, because 68544451777 - 2³ = 68544451769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68544451477) 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 15 ways as a sum of consecutive naturals, for example, 1152238 + ... + 1210264.

It is an arithmetic number, because the mean of its divisors is an integer number (4489278192).

Almost surely, 2^68544451777 is an apocalyptic number.

It is an amenable number.

68544451777 is a deficient number, since it is larger than the sum of its proper divisors (3283999295).

68544451777 is a wasteful number, since it uses less digits than its factorization.

68544451777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58728.

The product of its digits is 26342400, while the sum is 58.

The spelling of 68544451777 in words is "sixty-eight billion, five hundred forty-four million, four hundred fifty-one thousand, seven hundred seventy-seven".