72652776406013 has 4 divisors (see below), whose sum is σ = 72687555142620. Its totient is φ = 72617997669408.

The previous prime is 72652776405997. The next prime is 72652776406019. The reversal of 72652776406013 is 31060467725627.

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 62968002116644 + 9684774289369 = 7935238^2 + 3112037^2 .

It is a cyclic number.

It is not a de Polignac number, because 72652776406013 - 2⁴ = 72652776405997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72652776406013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72652776406019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17389365170 + ... + 17389369347.

It is an arithmetic number, because the mean of its divisors is an integer number (18171888785655).

Almost surely, 2^{72652776406013} is an apocalyptic number.

It is an amenable number.

72652776406013 is a deficient number, since it is larger than the sum of its proper divisors (34778736607).

72652776406013 is a wasteful number, since it uses less digits than its factorization.

72652776406013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34778736606.

The product of its (nonzero) digits is 17781120, while the sum is 56.

The spelling of 72652776406013 in words is "seventy-two trillion, six hundred fifty-two billion, seven hundred seventy-six million, four hundred six thousand, thirteen".