320081261142644 has 24 divisors (see below), whose sum is σ = 560886336393600. Its totient is φ = 159828103169280.

The previous prime is 320081261142641. The next prime is 320081261142653. The reversal of 320081261142644 is 446241162180023.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 320081261142595 and 320081261142604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320081261142641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5689412 + ... + 25933220.

It is an arithmetic number, because the mean of its divisors is an integer number (23370264016400).

Almost surely, 2^{320081261142644} is an apocalyptic number.

It is an amenable number.

320081261142644 is a deficient number, since it is larger than the sum of its proper divisors (240805075250956).

320081261142644 is a wasteful number, since it uses less digits than its factorization.

320081261142644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20249063 (or 20249061 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The spelling of 320081261142644 in words is "three hundred twenty trillion, eighty-one billion, two hundred sixty-one million, one hundred forty-two thousand, six hundred forty-four".