64525500 has 144 divisors (see below), whose sum is σ = 219413376. Its totient is φ = 15868800.

The previous prime is 64525481. The next prime is 64525507. The reversal of 64525500 is 552546.

64525500 is a `hidden beast` number, since 64 + 52 + 550 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64525507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57949 + ... + 59051.

It is an arithmetic number, because the mean of its divisors is an integer number (1523704).

Almost surely, 2^64525500 is an apocalyptic number.

64525500 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 64525500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109706688).

64525500 is an abundant number, since it is smaller than the sum of its proper divisors (154887876).

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

64525500 is a wasteful number, since it uses less digits than its factorization.

64525500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141 (or 1126 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 64525500 is about 8032.7766058817. The cubic root of 64525500 is about 401.0918088389.

It can be divided in two parts, 64525 and 500, that added together give a square (65025 = 255²).

The spelling of 64525500 in words is "sixty-four million, five hundred twenty-five thousand, five hundred".