64562520 has 128 divisors (see below), whose sum is σ = 215136000. Its totient is φ = 15367680.

The previous prime is 64562503. The next prime is 64562527. The reversal of 64562520 is 2526546.

64562520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64562527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77466 + ... + 78294.

It is an arithmetic number, because the mean of its divisors is an integer number (1680750).

Almost surely, 2^64562520 is an apocalyptic number.

64562520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64562520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107568000).

64562520 is an abundant number, since it is smaller than the sum of its proper divisors (150573480).

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

64562520 is a wasteful number, since it uses less digits than its factorization.

64562520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 64562520 is about 8035.0805845368. The cubic root of 64562520 is about 401.1684998630.

The spelling of 64562520 in words is "sixty-four million, five hundred sixty-two thousand, five hundred twenty".