64481964 has 48 divisors (see below), whose sum is σ = 156979200. Its totient is φ = 20575296.

The previous prime is 64481957. The next prime is 64482007. The reversal of 64481964 is 46918446.

It is a super-3 number, since 3×64481964³ (a number of 24 digits) contains 333 as substring.

It is a zygodrome in base 11.

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 15 ways as a sum of consecutive naturals, for example, 43467 + ... + 44925.

It is an arithmetic number, because the mean of its divisors is an integer number (3270400).

Almost surely, 2^64481964 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 64481964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78489600).

64481964 is an abundant number, since it is smaller than the sum of its proper divisors (92497236).

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

64481964 is a wasteful number, since it uses less digits than its factorization.

64481964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622 (or 1620 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 64481964 is about 8030.0662512834. The cubic root of 64481964 is about 401.0015816589.

The spelling of 64481964 in words is "sixty-four million, four hundred eighty-one thousand, nine hundred sixty-four".