65809572 has 12 divisors (see below), whose sum is σ = 153555696. Its totient is φ = 21936520.

The previous prime is 65809571. The next prime is 65809577. The reversal of 65809572 is 27590856.

65809572 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 (12).

It is not an unprimeable number, because it can be changed into a prime (65809571) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2742054 + ... + 2742077.

It is an arithmetic number, because the mean of its divisors is an integer number (12796308).

Almost surely, 2^65809572 is an apocalyptic number.

It is an amenable number.

65809572 is an abundant number, since it is smaller than the sum of its proper divisors (87746124).

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

65809572 is a wasteful number, since it uses less digits than its factorization.

65809572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5484138 (or 5484136 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 65809572 is about 8112.3099053229. The cubic root of 65809572 is about 403.7349583357.

The spelling of 65809572 in words is "sixty-five million, eight hundred nine thousand, five hundred seventy-two".