64513512 has 96 divisors (see below), whose sum is σ = 210225600. Its totient is φ = 17459712.

The previous prime is 64513507. The next prime is 64513513. The reversal of 64513512 is 21531546.

64513512 is a `hidden beast` number, since 645 + 1 + 3 + 5 + 12 = 666.

It is not an unprimeable number, because it can be changed into a prime (64513513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6208 + ... + 12944.

It is an arithmetic number, because the mean of its divisors is an integer number (2189850).

Almost surely, 2^64513512 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 64513512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105112800).

64513512 is an abundant number, since it is smaller than the sum of its proper divisors (145712088).

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

64513512 is a wasteful number, since it uses less digits than its factorization.

64513512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6775 (or 6768 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 64513512 is about 8032.0303784286. The cubic root of 64513512 is about 401.0669680839.

It can be divided in two parts, 64513 and 512, that added together give a square (65025 = 255²).

The spelling of 64513512 in words is "sixty-four million, five hundred thirteen thousand, five hundred twelve".