65415625 has 36 divisors (see below), whose sum is σ = 90392652. Its totient is φ = 47300000.

The previous prime is 65415617. The next prime is 65415629. The reversal of 65415625 is 52651456.

It can be written as a sum of positive squares in 6 ways, for example, as 40144896 + 25270729 = 6336^2 + 5027^2 .

It is not a de Polignac number, because 65415625 - 2³ = 65415617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65415629) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 378039 + ... + 378211.

It is an arithmetic number, because the mean of its divisors is an integer number (2510907).

Almost surely, 2^65415625 is an apocalyptic number.

It is an amenable number.

65415625 is a deficient number, since it is larger than the sum of its proper divisors (24977027).

65415625 is an equidigital number, since it uses as much as digits as its factorization.

65415625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 189 counting only the distinct ones).

The product of its digits is 36000, while the sum is 34.

The square root of 65415625 is about 8087.9926434190. The cubic root of 65415625 is about 402.9277373526.

The spelling of 65415625 in words is "sixty-five million, four hundred fifteen thousand, six hundred twenty-five".