65311625 has 32 divisors (see below), whose sum is σ = 86486400. Its totient is φ = 49156800.

The previous prime is 65311619. The next prime is 65311639. The reversal of 65311625 is 52611356.

65311625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65311625 - 2⁸ = 65311369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155666 + ... + 156084.

It is an arithmetic number, because the mean of its divisors is an integer number (2702700).

Almost surely, 2^65311625 is an apocalyptic number.

It is an amenable number.

65311625 is a deficient number, since it is larger than the sum of its proper divisors (21174775).

65311625 is a wasteful number, since it uses less digits than its factorization.

65311625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 496 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 65311625 is about 8081.5608022213. The cubic root of 65311625 is about 402.7140946570.

The spelling of 65311625 in words is "sixty-five million, three hundred eleven thousand, six hundred twenty-five".