65312560 has 40 divisors (see below), whose sum is σ = 152240256. Its totient is φ = 26058240.

The previous prime is 65312543. The next prime is 65312573. The reversal of 65312560 is 6521356.

65312560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 40897 + ... + 42463.

Almost surely, 2^65312560 is an apocalyptic number.

It is an amenable number.

65312560 is an abundant number, since it is smaller than the sum of its proper divisors (86927696).

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

65312560 is a wasteful number, since it uses less digits than its factorization.

65312560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101 (or 2095 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 65312560 is about 8081.6186497508. The cubic root of 65312560 is about 402.7160163970.

The spelling of 65312560 in words is "sixty-five million, three hundred twelve thousand, five hundred sixty".