65180344321 has 4 divisors (see below), whose sum is σ = 65570645952. Its totient is φ = 64790042692.

The previous prime is 65180344289. The next prime is 65180344357. The reversal of 65180344321 is 12344308156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65180344321 - 2⁵ = 65180344289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65180344921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195150565 + ... + 195150898.

It is an arithmetic number, because the mean of its divisors is an integer number (16392661488).

Almost surely, 2^65180344321 is an apocalyptic number.

It is an amenable number.

65180344321 is a deficient number, since it is larger than the sum of its proper divisors (390301631).

65180344321 is a wasteful number, since it uses less digits than its factorization.

65180344321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390301630.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 65180344321 in words is "sixty-five billion, one hundred eighty million, three hundred forty-four thousand, three hundred twenty-one".