72712044577 has 4 divisors (see below), whose sum is σ = 72723906580. Its totient is φ = 72700182576.

The previous prime is 72712044571. The next prime is 72712044611. The reversal of 72712044577 is 77544021727.

It is a happy number.

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 70896517696 + 1815526881 = 266264^2 + 42609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72712044577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72712044571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5921802 + ... + 5934067.

It is an arithmetic number, because the mean of its divisors is an integer number (18180976645).

Almost surely, 2^72712044577 is an apocalyptic number.

It is an amenable number.

72712044577 is a deficient number, since it is larger than the sum of its proper divisors (11862003).

72712044577 is a wasteful number, since it uses less digits than its factorization.

72712044577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11862002.

The product of its (nonzero) digits is 768320, while the sum is 46.

The spelling of 72712044577 in words is "seventy-two billion, seven hundred twelve million, forty-four thousand, five hundred seventy-seven".