65806161804 has 24 divisors (see below), whose sum is σ = 170608567920. Its totient is φ = 21935387232.

The previous prime is 65806161793. The next prime is 65806161821. The reversal of 65806161804 is 40816160856.

65806161804 is a `hidden beast` number, since 6 + 580 + 6 + 1 + 61 + 8 + 0 + 4 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 65806161804.

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 7 ways as a sum of consecutive naturals, for example, 304658049 + ... + 304658264.

It is an arithmetic number, because the mean of its divisors is an integer number (7108690330).

Almost surely, 2^65806161804 is an apocalyptic number.

It is an amenable number.

65806161804 is an abundant number, since it is smaller than the sum of its proper divisors (104802406116).

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

65806161804 is a wasteful number, since it uses less digits than its factorization.

65806161804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609316326 (or 609316318 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 65806161804 in words is "sixty-five billion, eight hundred six million, one hundred sixty-one thousand, eight hundred four".