64993824722 has 18 divisors (see below), whose sum is σ = 98922146679. Its totient is φ = 32026590540.

The previous prime is 64993824713. The next prime is 64993824739. The reversal of 64993824722 is 22742839946.

It can be written as a sum of positive squares in only one way, i.e., 32496912361 + 32496912361 = 180269^2 + 180269^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=180269.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25596929 + ... + 25599467.

Almost surely, 2^64993824722 is an apocalyptic number.

64993824722 is a deficient number, since it is larger than the sum of its proper divisors (33928321957).

64993824722 is an frugal number, since it uses more digits than its factorization.

64993824722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5222 (or 2612 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 56.

The spelling of 64993824722 in words is "sixty-four billion, nine hundred ninety-three million, eight hundred twenty-four thousand, seven hundred twenty-two".