64520532 has 18 divisors (see below), whose sum is σ = 163093658. Its totient is φ = 21506832.

The previous prime is 64520509. The next prime is 64520537. The reversal of 64520532 is 23502546.

It can be written as a sum of positive squares in only one way, i.e., 50637456 + 13883076 = 7116^2 + 3726^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 64520496 and 64520505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64520537) 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 5 ways as a sum of consecutive naturals, for example, 896083 + ... + 896154.

Almost surely, 2^64520532 is an apocalyptic number.

It is an amenable number.

64520532 is an abundant number, since it is smaller than the sum of its proper divisors (98573126).

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

64520532 is a wasteful number, since it uses less digits than its factorization.

64520532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792247 (or 1792242 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 64520532 is about 8032.4673668805. The cubic root of 64520532 is about 401.0815148453.

The spelling of 64520532 in words is "sixty-four million, five hundred twenty thousand, five hundred thirty-two".