65163949220 has 24 divisors (see below), whose sum is σ = 137031014904. Its totient is φ = 26030013696.

The previous prime is 65163949217. The next prime is 65163949289. The reversal of 65163949220 is 2294936156.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23362511104 + 41801438116 = 152848^2 + 204454^2 .

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2207849 + ... + 2237168.

It is an arithmetic number, because the mean of its divisors is an integer number (5709625621).

Almost surely, 2^65163949220 is an apocalyptic number.

It is an amenable number.

65163949220 is an abundant number, since it is smaller than the sum of its proper divisors (71867065684).

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

65163949220 is a wasteful number, since it uses less digits than its factorization.

65163949220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4445759 (or 4445757 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 65163949220 in words is "sixty-five billion, one hundred sixty-three million, nine hundred forty-nine thousand, two hundred twenty".