64515136 has 112 divisors (see below), whose sum is σ = 159325056. Its totient is φ = 25288704.

The previous prime is 64515131. The next prime is 64515173. The reversal of 64515136 is 63151546.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 64515098 and 64515107.

It is not an unprimeable number, because it can be changed into a prime (64515131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327390 + ... + 327586.

Almost surely, 2^64515136 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 64515136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79662528).

64515136 is an abundant number, since it is smaller than the sum of its proper divisors (94809920).

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

64515136 is a wasteful number, since it uses less digits than its factorization.

64515136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 266 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 64515136 is about 8032.1314730276. The cubic root of 64515136 is about 401.0703334114.

The spelling of 64515136 in words is "sixty-four million, five hundred fifteen thousand, one hundred thirty-six".