609934918657 has 2 divisors, whose sum is σ = 609934918658. Its totient is φ = 609934918656.

The previous prime is 609934918639. The next prime is 609934918777. The reversal of 609934918657 is 756819439906.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 360773214736 + 249161703921 = 600644^2 + 499161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609934918657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 609934918592 and 609934918601.

It is not a weakly prime, because it can be changed into another prime (609934318657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304967459328 + 304967459329.

It is an arithmetic number, because the mean of its divisors is an integer number (304967459329).

Almost surely, 2^609934918657 is an apocalyptic number.

It is an amenable number.

609934918657 is a deficient number, since it is larger than the sum of its proper divisors (1).

609934918657 is an equidigital number, since it uses as much as digits as its factorization.

609934918657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88179840, while the sum is 67.

The spelling of 609934918657 in words is "six hundred nine billion, nine hundred thirty-four million, nine hundred eighteen thousand, six hundred fifty-seven".