72344123681 has 8 divisors (see below), whose sum is σ = 72504211200. Its totient is φ = 72184107600.

The previous prime is 72344123669. The next prime is 72344123693. The reversal of 72344123681 is 18632144327.

It is an interprime number because it is at equal distance from previous prime (72344123669) and next prime (72344123693).

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 72344123681 - 2³⁰ = 71270381857 is a prime.

It is a super-2 number, since 2×72344123681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72344123651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2352080 + ... + 2382638.

It is an arithmetic number, because the mean of its divisors is an integer number (9063026400).

Almost surely, 2^72344123681 is an apocalyptic number.

It is an amenable number.

72344123681 is a deficient number, since it is larger than the sum of its proper divisors (160087519).

72344123681 is a wasteful number, since it uses less digits than its factorization.

72344123681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35719.

The product of its digits is 193536, while the sum is 41.

The spelling of 72344123681 in words is "seventy-two billion, three hundred forty-four million, one hundred twenty-three thousand, six hundred eighty-one".