64570500 has 96 divisors (see below), whose sum is σ = 208965120. Its totient is φ = 17215200.

The previous prime is 64570481. The next prime is 64570507. The reversal of 64570500 is 507546.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (64570507) 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 31 ways as a sum of consecutive naturals, for example, 11109 + ... + 15891.

It is an arithmetic number, because the mean of its divisors is an integer number (2176720).

Almost surely, 2^64570500 is an apocalyptic number.

64570500 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 64570500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104482560).

64570500 is an abundant number, since it is smaller than the sum of its proper divisors (144394620).

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

64570500 is a wasteful number, since it uses less digits than its factorization.

64570500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4811 (or 4793 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 64570500 is about 8035.5771416868. The cubic root of 64570500 is about 401.1850274745.

The spelling of 64570500 in words is "sixty-four million, five hundred seventy thousand, five hundred".