72280955389 has 4 divisors (see below), whose sum is σ = 72286080256. Its totient is φ = 72275830524.

The previous prime is 72280955381. The next prime is 72280955471. The reversal of 72280955389 is 98355908227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98355908227 = 6551 ⋅15013877.

It is a cyclic number.

It is not a de Polignac number, because 72280955389 - 2³ = 72280955381 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 (72280955381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2541219 + ... + 2569504.

It is an arithmetic number, because the mean of its divisors is an integer number (18071520064).

Almost surely, 2^72280955389 is an apocalyptic number.

It is an amenable number.

72280955389 is a deficient number, since it is larger than the sum of its proper divisors (5124867).

72280955389 is a wasteful number, since it uses less digits than its factorization.

72280955389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5124866.

The product of its (nonzero) digits is 10886400, while the sum is 58.

The spelling of 72280955389 in words is "seventy-two billion, two hundred eighty million, nine hundred fifty-five thousand, three hundred eighty-nine".