64525000 has 96 divisors (see below), whose sum is σ = 158193000. Its totient is φ = 24640000.

The previous prime is 64524991. The next prime is 64525037. The reversal of 64525000 is 52546.

It can be written as a sum of positive squares in 12 ways, for example, as 39664804 + 24860196 = 6298^2 + 4986^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 724956 + ... + 725044.

Almost surely, 2^64525000 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 64525000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79096500).

64525000 is an abundant number, since it is smaller than the sum of its proper divisors (93668000).

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

64525000 is an equidigital number, since it uses as much as digits as its factorization.

64525000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 125 counting only the distinct ones).

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

The square root of 64525000 is about 8032.7454833326. The cubic root of 64525000 is about 401.0907728328.

Adding to 64525000 its reverse (52546), we get a palindrome (64577546).

The spelling of 64525000 in words is "sixty-four million, five hundred twenty-five thousand".