609934918655 has 4 divisors (see below), whose sum is σ = 731921902392. Its totient is φ = 487947934920.

The previous prime is 609934918639. The next prime is 609934918657. The reversal of 609934918655 is 556819439906.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556819439906 = 2 ⋅278409719953.

It is not a de Polignac number, because 609934918655 - 2⁴ = 609934918639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 609934918591 and 609934918600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609934918657) 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, 60993491861 + ... + 60993491870.

It is an arithmetic number, because the mean of its divisors is an integer number (182980475598).

Almost surely, 2^609934918655 is an apocalyptic number.

609934918655 is a deficient number, since it is larger than the sum of its proper divisors (121986983737).

609934918655 is a wasteful number, since it uses less digits than its factorization.

609934918655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121986983736.

The product of its (nonzero) digits is 62985600, while the sum is 65.

The spelling of 609934918655 in words is "six hundred nine billion, nine hundred thirty-four million, nine hundred eighteen thousand, six hundred fifty-five".