72944668319 has 4 divisors (see below), whose sum is σ = 73013290896. Its totient is φ = 72876045744.

The previous prime is 72944668271. The next prime is 72944668333. The reversal of 72944668319 is 91386644927.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72944668319 - 2²⁰ = 72943619743 is a prime.

It is a super-2 number, since 2×72944668319² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72944668519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34309694 + ... + 34311819.

It is an arithmetic number, because the mean of its divisors is an integer number (18253322724).

Almost surely, 2^72944668319 is an apocalyptic number.

72944668319 is a deficient number, since it is larger than the sum of its proper divisors (68622577).

72944668319 is a wasteful number, since it uses less digits than its factorization.

72944668319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68622576.

The product of its digits is 15676416, while the sum is 59.

The spelling of 72944668319 in words is "seventy-two billion, nine hundred forty-four million, six hundred sixty-eight thousand, three hundred nineteen".