72213612044 has 48 divisors (see below), whose sum is σ = 153421373952. Its totient is φ = 29033240832.

The previous prime is 72213612007. The next prime is 72213612059. The reversal of 72213612044 is 44021631227.

It is a self number, because there is not a number n which added to its sum of digits gives 72213612044.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100952 + ... + 393215.

It is an arithmetic number, because the mean of its divisors is an integer number (3196278624).

Almost surely, 2^72213612044 is an apocalyptic number.

It is an amenable number.

72213612044 is an abundant number, since it is smaller than the sum of its proper divisors (81207761908).

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

72213612044 is a wasteful number, since it uses less digits than its factorization.

72213612044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494502 (or 494500 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The spelling of 72213612044 in words is "seventy-two billion, two hundred thirteen million, six hundred twelve thousand, forty-four".