64368545777 has 2 divisors, whose sum is σ = 64368545778. Its totient is φ = 64368545776.

The previous prime is 64368545767. The next prime is 64368545797. The reversal of 64368545777 is 77754586346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55320921616 + 9047624161 = 235204^2 + 95119^2 .

It is a cyclic number.

It is not a de Polignac number, because 64368545777 - 2⁶ = 64368545713 is a prime.

It is not a weakly prime, because it can be changed into another prime (64368545737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32184272888 + 32184272889.

It is an arithmetic number, because the mean of its divisors is an integer number (32184272889).

Almost surely, 2^64368545777 is an apocalyptic number.

It is an amenable number.

64368545777 is a deficient number, since it is larger than the sum of its proper divisors (1).

64368545777 is an equidigital number, since it uses as much as digits as its factorization.

64368545777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 118540800, while the sum is 62.

The spelling of 64368545777 in words is "sixty-four billion, three hundred sixty-eight million, five hundred forty-five thousand, seven hundred seventy-seven".