72136435780 has 12 divisors (see below), whose sum is σ = 151486515180. Its totient is φ = 28854574304.

The previous prime is 72136435771. The next prime is 72136435843. The reversal of 72136435780 is 8753463127.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19347697216 + 52788738564 = 139096^2 + 229758^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72136435780.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1803410875 + ... + 1803410914.

It is an arithmetic number, because the mean of its divisors is an integer number (12623876265).

Almost surely, 2^72136435780 is an apocalyptic number.

It is an amenable number.

72136435780 is an abundant number, since it is smaller than the sum of its proper divisors (79350079400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72136435780 is a wasteful number, since it uses less digits than its factorization.

72136435780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606821798 (or 3606821796 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 72136435780 in words is "seventy-two billion, one hundred thirty-six million, four hundred thirty-five thousand, seven hundred eighty".