64949351329 has 2 divisors, whose sum is σ = 64949351330. Its totient is φ = 64949351328.

The previous prime is 64949351263. The next prime is 64949351351. The reversal of 64949351329 is 92315394946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60355222929 + 4594128400 = 245673^2 + 67780^2 .

It is a cyclic number.

It is not a de Polignac number, because 64949351329 - 2²⁹ = 64412480417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64949351329.

It is not a weakly prime, because it can be changed into another prime (64949351359) 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 as a sum of consecutive naturals, namely, 32474675664 + 32474675665.

It is an arithmetic number, because the mean of its divisors is an integer number (32474675665).

Almost surely, 2^64949351329 is an apocalyptic number.

It is an amenable number.

64949351329 is a deficient number, since it is larger than the sum of its proper divisors (1).

64949351329 is an equidigital number, since it uses as much as digits as its factorization.

64949351329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6298560, while the sum is 55.

The spelling of 64949351329 in words is "sixty-four billion, nine hundred forty-nine million, three hundred fifty-one thousand, three hundred twenty-nine".