65641965822 has 24 divisors (see below), whose sum is σ = 148407923664. Its totient is φ = 20929322304.

The previous prime is 65641965787. The next prime is 65641965863. The reversal of 65641965822 is 22856914656.

65641965822 is a `hidden beast` number, since 6 + 56 + 4 + 1 + 9 + 6 + 582 + 2 = 666.

It is a super-2 number, since 2×65641965822² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79277323 + ... + 79278150.

It is an arithmetic number, because the mean of its divisors is an integer number (6183663486).

Almost surely, 2^65641965822 is an apocalyptic number.

65641965822 is an abundant number, since it is smaller than the sum of its proper divisors (82765957842).

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

65641965822 is a wasteful number, since it uses less digits than its factorization.

65641965822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158555504 (or 158555501 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 65641965822 in words is "sixty-five billion, six hundred forty-one million, nine hundred sixty-five thousand, eight hundred twenty-two".