72672043613 has 4 divisors (see below), whose sum is σ = 78262200828. Its totient is φ = 67081886400.

The previous prime is 72672043583. The next prime is 72672043727. The reversal of 72672043613 is 31634027627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41517322564 + 31154721049 = 203758^2 + 176507^2 .

It is a cyclic number.

It is not a de Polignac number, because 72672043613 - 2¹⁰ = 72672042589 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 (72672043313) 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, 2795078588 + ... + 2795078613.

It is an arithmetic number, because the mean of its divisors is an integer number (19565550207).

Almost surely, 2^72672043613 is an apocalyptic number.

It is an amenable number.

72672043613 is a deficient number, since it is larger than the sum of its proper divisors (5590157215).

72672043613 is a wasteful number, since it uses less digits than its factorization.

72672043613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5590157214.

The product of its (nonzero) digits is 254016, while the sum is 41.

The spelling of 72672043613 in words is "seventy-two billion, six hundred seventy-two million, forty-three thousand, six hundred thirteen".