79944181204801 has 3 divisors (see below), whose sum is σ = 79944190145953. Its totient is φ = 79944172263650.

The previous prime is 79944181204799. The next prime is 79944181204813. The reversal of 79944181204801 is 10840218144997.

The square root of 79944181204801 is 8941151.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 79944181204801 - 2¹ = 79944181204799 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79944181204871) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4470576 + ... + 13411726.

Almost surely, 2^{79944181204801} is an apocalyptic number.

79944181204801 is the 8941151-st square number.

79944181204801 is the 4470576-th centered octagonal number.

It is an amenable number.

79944181204801 is a deficient number, since it is larger than the sum of its proper divisors (8941152).

79944181204801 is an frugal number, since it uses more digits than its factorization.

79944181204801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17882302 (or 8941151 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 79944181204801 in words is "seventy-nine trillion, nine hundred forty-four billion, one hundred eighty-one million, two hundred four thousand, eight hundred one".