64518984 has 128 divisors (see below), whose sum is σ = 192000000. Its totient is φ = 20015424.

The previous prime is 64518973. The next prime is 64518991. The reversal of 64518984 is 48981546.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 324117 + ... + 324315.

It is an arithmetic number, because the mean of its divisors is an integer number (1500000).

Almost surely, 2^64518984 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 64518984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96000000).

64518984 is an abundant number, since it is smaller than the sum of its proper divisors (127481016).

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

64518984 is a wasteful number, since it uses less digits than its factorization.

64518984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 302 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 64518984 is about 8032.3710073676. The cubic root of 64518984 is about 401.0783071886.

The spelling of 64518984 in words is "sixty-four million, five hundred eighteen thousand, nine hundred eighty-four".