72365325661 has 8 divisors (see below), whose sum is σ = 75516338880. Its totient is φ = 69214703712.

The previous prime is 72365325587. The next prime is 72365325709. The reversal of 72365325661 is 16652356327.

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

It is not a de Polignac number, because 72365325661 - 2¹³ = 72365317469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72365325761) 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, 317745 + ... + 495673.

It is an arithmetic number, because the mean of its divisors is an integer number (9439542360).

Almost surely, 2^72365325661 is an apocalyptic number.

It is an amenable number.

72365325661 is a deficient number, since it is larger than the sum of its proper divisors (3151013219).

72365325661 is a wasteful number, since it uses less digits than its factorization.

72365325661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195635.

The product of its digits is 1360800, while the sum is 46.

The spelling of 72365325661 in words is "seventy-two billion, three hundred sixty-five million, three hundred twenty-five thousand, six hundred sixty-one".