65615000 has 80 divisors (see below), whose sum is σ = 167852520. Its totient is φ = 23840000.

The previous prime is 65614993. The next prime is 65615041. The reversal of 65615000 is 51656.

65615000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 54404 + ... + 55596.

Almost surely, 2^65615000 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 65615000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83926260).

65615000 is an abundant number, since it is smaller than the sum of its proper divisors (102237520).

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

65615000 is a wasteful number, since it uses less digits than its factorization.

65615000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230 (or 1211 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 65615000 is about 8100.3086360953. The cubic root of 65615000 is about 403.3366724826.

Adding to 65615000 its reverse (51656), we get a palindrome (65666656).

The spelling of 65615000 in words is "sixty-five million, six hundred fifteen thousand".