64505553569 has 2 divisors, whose sum is σ = 64505553570. Its totient is φ = 64505553568.

The previous prime is 64505553529. The next prime is 64505553571. The reversal of 64505553569 is 96535550546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51308139169 + 13197414400 = 226513^2 + 114880^2 .

It is a cyclic number.

It is not a de Polignac number, because 64505553569 - 2³² = 60210586273 is a prime.

It is a super-2 number, since 2×64505553569² (a number of 22 digits) contains 22 as substring.

Together with 64505553571, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64505553569.

It is not a weakly prime, because it can be changed into another prime (64505553529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32252776784 + 32252776785.

It is an arithmetic number, because the mean of its divisors is an integer number (32252776785).

Almost surely, 2^64505553569 is an apocalyptic number.

It is an amenable number.

64505553569 is a deficient number, since it is larger than the sum of its proper divisors (1).

64505553569 is an equidigital number, since it uses as much as digits as its factorization.

64505553569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150000, while the sum is 53.

The spelling of 64505553569 in words is "sixty-four billion, five hundred five million, five hundred fifty-three thousand, five hundred sixty-nine".