64698864169 has 2 divisors, whose sum is σ = 64698864170. Its totient is φ = 64698864168.

The previous prime is 64698864133. The next prime is 64698864179. The reversal of 64698864169 is 96146889646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32876942400 + 31821921769 = 181320^2 + 178387^2 .

It is a cyclic number.

It is not a de Polignac number, because 64698864169 - 2¹¹ = 64698862121 is a prime.

It is a super-2 number, since 2×64698864169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64698864179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32349432084 + 32349432085.

It is an arithmetic number, because the mean of its divisors is an integer number (32349432085).

Almost surely, 2^64698864169 is an apocalyptic number.

It is an amenable number.

64698864169 is a deficient number, since it is larger than the sum of its proper divisors (1).

64698864169 is an equidigital number, since it uses as much as digits as its factorization.

64698864169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107495424, while the sum is 67.

The spelling of 64698864169 in words is "sixty-four billion, six hundred ninety-eight million, eight hundred sixty-four thousand, one hundred sixty-nine".