65128016 has 20 divisors (see below), whose sum is σ = 127965024. Its totient is φ = 32104800.

The previous prime is 65128009. The next prime is 65128027. The reversal of 65128016 is 61082156.

It is a happy number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 65128016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27530 + ... + 29801.

Almost surely, 2^65128016 is an apocalyptic number.

It is an amenable number.

65128016 is a deficient number, since it is larger than the sum of its proper divisors (62837008).

65128016 is a wasteful number, since it uses less digits than its factorization.

65128016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57410 (or 57404 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 65128016 is about 8070.1930584094. The cubic root of 65128016 is about 402.3363603153.

The spelling of 65128016 in words is "sixty-five million, one hundred twenty-eight thousand, sixteen".