721304672272511 has 4 divisors (see below), whose sum is σ = 721320983677224. Its totient is φ = 721288360867800.

The previous prime is 721304672272487. The next prime is 721304672272517. The reversal of 721304672272511 is 115272276403127.

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

It is a cyclic number.

It is not a de Polignac number, because 721304672272511 - 2²⁶ = 721304605163647 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 721304672272511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721304672272517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8155636025 + ... + 8155724466.

It is an arithmetic number, because the mean of its divisors is an integer number (180330245919306).

Almost surely, 2^{721304672272511} is an apocalyptic number.

721304672272511 is a deficient number, since it is larger than the sum of its proper divisors (16311404713).

721304672272511 is a wasteful number, since it uses less digits than its factorization.

721304672272511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16311404712.

The product of its (nonzero) digits is 1975680, while the sum is 50.

The spelling of 721304672272511 in words is "seven hundred twenty-one trillion, three hundred four billion, six hundred seventy-two million, two hundred seventy-two thousand, five hundred eleven".