72844883721 has 24 divisors (see below), whose sum is σ = 110080099584. Its totient is φ = 46370715840.

The previous prime is 72844883677. The next prime is 72844883723. The reversal of 72844883721 is 12738844827.

It is not a de Polignac number, because 72844883721 - 2⁷ = 72844883593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72844883723) 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 23 ways as a sum of consecutive naturals, for example, 2082781 + ... + 2117466.

It is an arithmetic number, because the mean of its divisors is an integer number (4586670816).

Almost surely, 2^72844883721 is an apocalyptic number.

It is an amenable number.

72844883721 is a deficient number, since it is larger than the sum of its proper divisors (37235215863).

72844883721 is a wasteful number, since it uses less digits than its factorization.

72844883721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200341 (or 4200338 counting only the distinct ones).

The product of its digits is 4816896, while the sum is 54.

The spelling of 72844883721 in words is "seventy-two billion, eight hundred forty-four million, eight hundred eighty-three thousand, seven hundred twenty-one".