64530136 has 32 divisors (see below), whose sum is σ = 132814080. Its totient is φ = 29149600.

The previous prime is 64530091. The next prime is 64530149. The reversal of 64530136 is 63103546.

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, 12501 + ... + 16891.

It is an arithmetic number, because the mean of its divisors is an integer number (4150440).

Almost surely, 2^64530136 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 64530136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66407040).

64530136 is an abundant number, since it is smaller than the sum of its proper divisors (68283944).

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

64530136 is a wasteful number, since it uses less digits than its factorization.

64530136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4575 (or 4571 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 64530136 is about 8033.0651684149. The cubic root of 64530136 is about 401.1014144320.

The spelling of 64530136 in words is "sixty-four million, five hundred thirty thousand, one hundred thirty-six".