65196983569 has 27 divisors (see below), whose sum is σ = 68688531387. Its totient is φ = 61881432624.

The previous prime is 65196983491. The next prime is 65196983573. The reversal of 65196983569 is 96538969156.

The square root of 65196983569 is 255337.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 58339156225 + 6857827344 = 241535^2 + 82812^2 .

It is a de Polignac number, because none of the positive numbers 2^k-65196983569 is a prime.

It is a super-2 number, since 2×65196983569² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is not an unprimeable number, because it can be changed into a prime (65196989569) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 632980372 + ... + 632980474.

It is an arithmetic number, because the mean of its divisors is an integer number (2544019681).

Almost surely, 2^65196983569 is an apocalyptic number.

65196983569 is the 255337-th square number.

65196983569 is the 127669-th centered octagonal number.

It is an amenable number.

65196983569 is a deficient number, since it is larger than the sum of its proper divisors (3491547818).

65196983569 is an frugal number, since it uses more digits than its factorization.

65196983569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 207 counting only the distinct ones).

The product of its digits is 94478400, while the sum is 67.

The spelling of 65196983569 in words is "sixty-five billion, one hundred ninety-six million, nine hundred eighty-three thousand, five hundred sixty-nine".