555809694647 has 4 divisors (see below), whose sum is σ = 558914776920. Its totient is φ = 552704612376.

The previous prime is 555809694617. The next prime is 555809694719. The reversal of 555809694647 is 746496908555.

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

It is a cyclic number.

It is not a de Polignac number, because 555809694647 - 2³⁴ = 538629825463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555809694617) 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, 1552540868 + ... + 1552541225.

It is an arithmetic number, because the mean of its divisors is an integer number (139728694230).

Almost surely, 2^555809694647 is an apocalyptic number.

555809694647 is a deficient number, since it is larger than the sum of its proper divisors (3105082273).

555809694647 is a wasteful number, since it uses less digits than its factorization.

555809694647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105082272.

The product of its (nonzero) digits is 326592000, while the sum is 68.

The spelling of 555809694647 in words is "five hundred fifty-five billion, eight hundred nine million, six hundred ninety-four thousand, six hundred forty-seven".