609870618055 has 4 divisors (see below), whose sum is σ = 731844741672. Its totient is φ = 487896494440.

The previous prime is 609870618053. The next prime is 609870618079. The reversal of 609870618055 is 550816078906.

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

It is not a de Polignac number, because 609870618055 - 2¹ = 609870618053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 609870617987 and 609870618005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609870618053) 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, 60987061801 + ... + 60987061810.

It is an arithmetic number, because the mean of its divisors is an integer number (182961185418).

Almost surely, 2^609870618055 is an apocalyptic number.

609870618055 is a deficient number, since it is larger than the sum of its proper divisors (121974123617).

609870618055 is a wasteful number, since it uses less digits than its factorization.

609870618055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121974123616.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 609870618055 in words is "six hundred nine billion, eight hundred seventy million, six hundred eighteen thousand, fifty-five".