617426372609 has 4 divisors (see below), whose sum is σ = 617961869316. Its totient is φ = 616890875904.

The previous prime is 617426372567. The next prime is 617426372621. The reversal of 617426372609 is 906273624716.

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 491922682384 + 125503690225 = 701372^2 + 354265^2 .

It is a cyclic number.

It is not a de Polignac number, because 617426372609 - 2²⁸ = 617157937153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617426372659) 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, 267746624 + ... + 267748929.

It is an arithmetic number, because the mean of its divisors is an integer number (154490467329).

Almost surely, 2^617426372609 is an apocalyptic number.

It is an amenable number.

617426372609 is a deficient number, since it is larger than the sum of its proper divisors (535496707).

617426372609 is a wasteful number, since it uses less digits than its factorization.

617426372609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535496706.

The product of its (nonzero) digits is 4572288, while the sum is 53.

The spelling of 617426372609 in words is "six hundred seventeen billion, four hundred twenty-six million, three hundred seventy-two thousand, six hundred nine".