65615488 has 16 divisors (see below), whose sum is σ = 130718610. Its totient is φ = 32807680.

The previous prime is 65615477. The next prime is 65615491. The reversal of 65615488 is 88451656.

It can be written as a sum of positive squares in only one way, i.e., 50808384 + 14807104 = 7128^2 + 3848^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256183 + ... + 256438.

Almost surely, 2^65615488 is an apocalyptic number.

It is an amenable number.

65615488 is a deficient number, since it is larger than the sum of its proper divisors (65103122).

65615488 is an equidigital number, since it uses as much as digits as its factorization.

65615488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512635 (or 512623 counting only the distinct ones).

The product of its digits is 230400, while the sum is 43.

The square root of 65615488 is about 8100.3387583483. The cubic root of 65615488 is about 403.3376723952.

The spelling of 65615488 in words is "sixty-five million, six hundred fifteen thousand, four hundred eighty-eight".