72244538305 has 8 divisors (see below), whose sum is σ = 86700209472. Its totient is φ = 57791121648.

The previous prime is 72244538243. The next prime is 72244538357. The reversal of 72244538305 is 50383544227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72244538305 - 2⁹ = 72244537793 is a prime.

It is a super-2 number, since 2×72244538305² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492307 + ... + 621976.

It is an arithmetic number, because the mean of its divisors is an integer number (10837526184).

Almost surely, 2^72244538305 is an apocalyptic number.

It is an amenable number.

72244538305 is a deficient number, since it is larger than the sum of its proper divisors (14455671167).

72244538305 is a wasteful number, since it uses less digits than its factorization.

72244538305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127255.

The product of its (nonzero) digits is 806400, while the sum is 43.

The spelling of 72244538305 in words is "seventy-two billion, two hundred forty-four million, five hundred thirty-eight thousand, three hundred five".