64669745522 has 6 divisors (see below), whose sum is σ = 97005157743. Its totient is φ = 32334692942.

The previous prime is 64669745489. The next prime is 64669745527. The reversal of 64669745522 is 22554796646.

It can be written as a sum of positive squares in only one way, i.e., 32334872761 + 32334872761 = 179819^2 + 179819^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=179819.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64669745527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 269729 + ... + 449547.

Almost surely, 2^64669745522 is an apocalyptic number.

64669745522 is a deficient number, since it is larger than the sum of its proper divisors (32335412221).

64669745522 is an frugal number, since it uses more digits than its factorization.

64669745522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359640 (or 179821 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 56.

The spelling of 64669745522 in words is "sixty-four billion, six hundred sixty-nine million, seven hundred forty-five thousand, five hundred twenty-two".