65571965522 has 18 divisors (see below), whose sum is σ = 114420812247. Its totient is φ = 28101184524.

The previous prime is 65571965521. The next prime is 65571965527. The reversal of 65571965522 is 22556917556.

It can be written as a sum of positive squares in only one way, i.e., 32785982761 + 32785982761 = 181069^2 + 181069^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=181069.

It is not an unprimeable number, because it can be changed into a prime (65571965521) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2522033 + ... + 2547899.

Almost surely, 2^65571965522 is an apocalyptic number.

65571965522 is a deficient number, since it is larger than the sum of its proper divisors (48848846725).

65571965522 is an frugal number, since it uses more digits than its factorization.

65571965522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51750 (or 25876 counting only the distinct ones).

The product of its digits is 5670000, while the sum is 53.

The spelling of 65571965522 in words is "sixty-five billion, five hundred seventy-one million, nine hundred sixty-five thousand, five hundred twenty-two".