79944644997 has 48 divisors (see below), whose sum is σ = 137836433280. Its totient is φ = 43694557056.

The previous prime is 79944644977. The next prime is 79944645007.

79944644997 is a `hidden beast` number, since 7 + 9 + 94 + 4 + 6 + 449 + 97 = 666.

79944644997 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 79944644997 - 2⁶ = 79944644933 is a prime.

It is a super-2 number, since 2×79944644997² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79944644947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 153118 + ... + 428175.

It is an arithmetic number, because the mean of its divisors is an integer number (2871592360).

Almost surely, 2^79944644997 is an apocalyptic number.

It is an amenable number.

79944644997 is a deficient number, since it is larger than the sum of its proper divisors (57891788283).

79944644997 is a wasteful number, since it uses less digits than its factorization.

79944644997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581402 (or 581399 counting only the distinct ones).

The product of its digits is 493807104, while the sum is 72.

The spelling of 79944644997 in words is "seventy-nine billion, nine hundred forty-four million, six hundred forty-four thousand, nine hundred ninety-seven".