64816312277 has 2 divisors, whose sum is σ = 64816312278. Its totient is φ = 64816312276.

The previous prime is 64816312247. The next prime is 64816312339. The reversal of 64816312277 is 77221361846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64543434916 + 272877361 = 254054^2 + 16519^2 .

It is a cyclic number.

It is not a de Polignac number, because 64816312277 - 2¹⁰ = 64816311253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64816312247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32408156138 + 32408156139.

It is an arithmetic number, because the mean of its divisors is an integer number (32408156139).

Almost surely, 2^64816312277 is an apocalyptic number.

It is an amenable number.

64816312277 is a deficient number, since it is larger than the sum of its proper divisors (1).

64816312277 is an equidigital number, since it uses as much as digits as its factorization.

64816312277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The spelling of 64816312277 in words is "sixty-four billion, eight hundred sixteen million, three hundred twelve thousand, two hundred seventy-seven".