64523000 has 64 divisors (see below), whose sum is σ = 152586720. Its totient is φ = 25536000.

The previous prime is 64522987. The next prime is 64523003. The reversal of 64523000 is 32546.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64523003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112715 + ... + 113285.

Almost surely, 2^64523000 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 64523000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76293360).

64523000 is an abundant number, since it is smaller than the sum of its proper divisors (88063720).

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

64523000 is a wasteful number, since it uses less digits than its factorization.

64523000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 64523000 is about 8032.6209919303. The cubic root of 64523000 is about 401.0866287552.

Adding to 64523000 its reverse (32546), we get a palindrome (64555546).

The spelling of 64523000 in words is "sixty-four million, five hundred twenty-three thousand".