72406872389 has 16 divisors (see below), whose sum is σ = 75313580160. Its totient is φ = 69555775680.

The previous prime is 72406872367. The next prime is 72406872469. The reversal of 72406872389 is 98327860427.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72406872389 - 2¹² = 72406868293 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 (72406872319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 891992 + ... + 969774.

It is an arithmetic number, because the mean of its divisors is an integer number (4707098760).

Almost surely, 2^72406872389 is an apocalyptic number.

It is an amenable number.

72406872389 is a deficient number, since it is larger than the sum of its proper divisors (2906707771).

72406872389 is a wasteful number, since it uses less digits than its factorization.

72406872389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78140.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 72406872389 in words is "seventy-two billion, four hundred six million, eight hundred seventy-two thousand, three hundred eighty-nine".