72712212636 has 96 divisors (see below), whose sum is σ = 196284175360. Its totient is φ = 20520428544.

The previous prime is 72712212613. The next prime is 72712212653. The reversal of 72712212636 is 63621221727.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 72712212594 and 72712212603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3424260 + ... + 3445428.

Almost surely, 2^72712212636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72712212636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98142087680).

72712212636 is an abundant number, since it is smaller than the sum of its proper divisors (123571962724).

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

72712212636 is a wasteful number, since it uses less digits than its factorization.

72712212636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21683 (or 21681 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

Subtracting from 72712212636 its reverse (63621221727), we obtain a palindrome (9090990909).

The spelling of 72712212636 in words is "seventy-two billion, seven hundred twelve million, two hundred twelve thousand, six hundred thirty-six".