64644305279 has 2 divisors, whose sum is σ = 64644305280. Its totient is φ = 64644305278.

The previous prime is 64644305263. The next prime is 64644305303. The reversal of 64644305279 is 97250344646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64644305279 - 2⁴ = 64644305263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64644307279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32322152639 + 32322152640.

It is an arithmetic number, because the mean of its divisors is an integer number (32322152640).

Almost surely, 2^64644305279 is an apocalyptic number.

64644305279 is a deficient number, since it is larger than the sum of its proper divisors (1).

64644305279 is an equidigital number, since it uses as much as digits as its factorization.

64644305279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 50.

The spelling of 64644305279 in words is "sixty-four billion, six hundred forty-four million, three hundred five thousand, two hundred seventy-nine".