64868324977 has 2 divisors, whose sum is σ = 64868324978. Its totient is φ = 64868324976.

The previous prime is 64868324959. The next prime is 64868324987. The reversal of 64868324977 is 77942386846.

64868324977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40035607921 + 24832717056 = 200089^2 + 157584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64868324977 is a prime.

It is not a weakly prime, because it can be changed into another prime (64868324987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32434162488 + 32434162489.

It is an arithmetic number, because the mean of its divisors is an integer number (32434162489).

Almost surely, 2^64868324977 is an apocalyptic number.

It is an amenable number.

64868324977 is a deficient number, since it is larger than the sum of its proper divisors (1).

64868324977 is an equidigital number, since it uses as much as digits as its factorization.

64868324977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97542144, while the sum is 64.

The spelling of 64868324977 in words is "sixty-four billion, eight hundred sixty-eight million, three hundred twenty-four thousand, nine hundred seventy-seven".