72265856213 has 16 divisors (see below), whose sum is σ = 75658774896. Its totient is φ = 68950103040.

The previous prime is 72265856197. The next prime is 72265856237. The reversal of 72265856213 is 31265856227.

It can be written as a sum of positive squares in 8 ways, for example, as 7972168369 + 64293687844 = 89287^2 + 253562^2 .

It is a cyclic number.

It is not a de Polignac number, because 72265856213 - 2⁴ = 72265856197 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 (72265856293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4229195 + ... + 4246247.

It is an arithmetic number, because the mean of its divisors is an integer number (4728673431).

Almost surely, 2^72265856213 is an apocalyptic number.

It is an amenable number.

72265856213 is a deficient number, since it is larger than the sum of its proper divisors (3392918683).

72265856213 is a wasteful number, since it uses less digits than its factorization.

72265856213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19304.

The product of its digits is 1209600, while the sum is 47.

The spelling of 72265856213 in words is "seventy-two billion, two hundred sixty-five million, eight hundred fifty-six thousand, two hundred thirteen".