65155625 has 20 divisors (see below), whose sum is σ = 82801620. Its totient is φ = 51240000.

The previous prime is 65155613. The next prime is 65155633. The reversal of 65155625 is 52655156.

It can be written as a sum of positive squares in 10 ways, for example, as 65092624 + 63001 = 8068^2 + 251^2 .

It is not a de Polignac number, because 65155625 - 2⁴ = 65155609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37271 + ... + 38979.

It is an arithmetic number, because the mean of its divisors is an integer number (4140081).

Almost surely, 2^65155625 is an apocalyptic number.

It is an amenable number.

65155625 is a deficient number, since it is larger than the sum of its proper divisors (17645995).

65155625 is an equidigital number, since it uses as much as digits as its factorization.

65155625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790 (or 1775 counting only the distinct ones).

The product of its digits is 45000, while the sum is 35.

The square root of 65155625 is about 8071.9034310378. The cubic root of 65155625 is about 402.3932049524.

The spelling of 65155625 in words is "sixty-five million, one hundred fifty-five thousand, six hundred twenty-five".