72721416699 has 6 divisors (see below), whose sum is σ = 105042046356. Its totient is φ = 48480944460.

The previous prime is 72721416683. The next prime is 72721416751. The reversal of 72721416699 is 99661412727.

72721416699 is a `hidden beast` number, since 72 + 72 + 1 + 416 + 6 + 99 = 666.

It is not a de Polignac number, because 72721416699 - 2⁴ = 72721416683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72721416799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4040078697 + ... + 4040078714.

It is an arithmetic number, because the mean of its divisors is an integer number (17507007726).

Almost surely, 2^72721416699 is an apocalyptic number.

72721416699 is a deficient number, since it is larger than the sum of its proper divisors (32320629657).

72721416699 is a wasteful number, since it uses less digits than its factorization.

72721416699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8080157417 (or 8080157414 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The spelling of 72721416699 in words is "seventy-two billion, seven hundred twenty-one million, four hundred sixteen thousand, six hundred ninety-nine".