64818765293 has 2 divisors, whose sum is σ = 64818765294. Its totient is φ = 64818765292.

The previous prime is 64818765289. The next prime is 64818765337. The reversal of 64818765293 is 39256781846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49183263529 + 15635501764 = 221773^2 + 125042^2 .

It is a cyclic number.

It is not a de Polignac number, because 64818765293 - 2² = 64818765289 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64818765283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32409382646 + 32409382647.

It is an arithmetic number, because the mean of its divisors is an integer number (32409382647).

Almost surely, 2^64818765293 is an apocalyptic number.

It is an amenable number.

64818765293 is a deficient number, since it is larger than the sum of its proper divisors (1).

64818765293 is an equidigital number, since it uses as much as digits as its factorization.

64818765293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17418240, while the sum is 59.

The spelling of 64818765293 in words is "sixty-four billion, eight hundred eighteen million, seven hundred sixty-five thousand, two hundred ninety-three".