64520500 has 48 divisors (see below), whose sum is σ = 153736128. Its totient is φ = 23460000.

The previous prime is 64520473. The next prime is 64520501. The reversal of 64520500 is 502546.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64520501) 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, 366 + ... + 11365.

It is an arithmetic number, because the mean of its divisors is an integer number (3202836).

Almost surely, 2^64520500 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 64520500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76868064).

64520500 is an abundant number, since it is smaller than the sum of its proper divisors (89215628).

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

64520500 is a wasteful number, since it uses less digits than its factorization.

64520500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11761 (or 11749 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 64520500 is about 8032.4653749643. The cubic root of 64520500 is about 401.0814485377.

The spelling of 64520500 in words is "sixty-four million, five hundred twenty thousand, five hundred".