64513536 has 80 divisors (see below), whose sum is σ = 174040944. Its totient is φ = 21233664.

The previous prime is 64513517. The next prime is 64513549. The reversal of 64513536 is 63531546.

It is a junction number, because it is equal to n+sod(n) for n = 64513497 and 64513506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148776 + ... + 149208.

Almost surely, 2^64513536 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 64513536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87020472).

64513536 is an abundant number, since it is smaller than the sum of its proper divisors (109527408).

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

64513536 is an equidigital number, since it uses as much as digits as its factorization.

64513536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 535 counting only the distinct ones).

The product of its digits is 32400, while the sum is 33.

The square root of 64513536 is about 8032.0318724467. The cubic root of 64513536 is about 401.0670178182.

The spelling of 64513536 in words is "sixty-four million, five hundred thirteen thousand, five hundred thirty-six".