64322787984 has 160 divisors (see below), whose sum is σ = 204826723584. Its totient is φ = 16938270720.

The previous prime is 64322787983. The next prime is 64322788003. The reversal of 64322787984 is 48978722346.

It is a happy number.

It is a super-2 number, since 2×64322787984² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64322787983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2928724 + ... + 2950604.

Almost surely, 2^64322787984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64322787984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102413361792).

64322787984 is an abundant number, since it is smaller than the sum of its proper divisors (140503935600).

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

64322787984 is a wasteful number, since it uses less digits than its factorization.

64322787984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22585 (or 22579 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 60.

The spelling of 64322787984 in words is "sixty-four billion, three hundred twenty-two million, seven hundred eighty-seven thousand, nine hundred eighty-four".