64985166048 has 144 divisors (see below), whose sum is σ = 187801141248. Its totient is φ = 19661241600.

The previous prime is 64985166047. The next prime is 64985166109. The reversal of 64985166048 is 84066158946.

It is a super-2 number, since 2×64985166048² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64985166047) 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 23 ways as a sum of consecutive naturals, for example, 7929633 + ... + 7937823.

It is an arithmetic number, because the mean of its divisors is an integer number (1304174592).

Almost surely, 2^64985166048 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 64985166048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93900570624).

64985166048 is an abundant number, since it is smaller than the sum of its proper divisors (122815975200).

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

64985166048 is a wasteful number, since it uses less digits than its factorization.

64985166048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8909 (or 8890 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 57.

The spelling of 64985166048 in words is "sixty-four billion, nine hundred eighty-five million, one hundred sixty-six thousand, forty-eight".