64533323136 has 32 divisors (see below), whose sum is σ = 171416640600. Its totient is φ = 21511107584.

The previous prime is 64533323039. The next prime is 64533323149. The reversal of 64533323136 is 63132333546.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 64533323094 and 64533323103.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 84027381 + ... + 84028148.

Almost surely, 2^64533323136 is an apocalyptic number.

It is an amenable number.

64533323136 is an abundant number, since it is smaller than the sum of its proper divisors (106883317464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64533323136 is a wasteful number, since it uses less digits than its factorization.

64533323136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168055546 (or 168055534 counting only the distinct ones).

The product of its digits is 349920, while the sum is 39.

The spelling of 64533323136 in words is "sixty-four billion, five hundred thirty-three million, three hundred twenty-three thousand, one hundred thirty-six".