609445798721 has 4 divisors (see below), whose sum is σ = 609476156100. Its totient is φ = 609415441344.

The previous prime is 609445798693. The next prime is 609445798751. The reversal of 609445798721 is 127897544906.

609445798721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 72098157121 + 537347641600 = 268511^2 + 733040^2 .

It is a cyclic number.

It is not a de Polignac number, because 609445798721 - 2⁶ = 609445798657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (609445798751) 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, 15148556 + ... + 15188733.

It is an arithmetic number, because the mean of its divisors is an integer number (152369039025).

Almost surely, 2^609445798721 is an apocalyptic number.

It is an amenable number.

609445798721 is a deficient number, since it is larger than the sum of its proper divisors (30357379).

609445798721 is a wasteful number, since it uses less digits than its factorization.

609445798721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30357378.

The product of its (nonzero) digits is 30481920, while the sum is 62.

The spelling of 609445798721 in words is "six hundred nine billion, four hundred forty-five million, seven hundred ninety-eight thousand, seven hundred twenty-one".