555661155655 has 4 divisors (see below), whose sum is σ = 666793386792. Its totient is φ = 444528924520.

The previous prime is 555661155629. The next prime is 555661155667. The reversal of 555661155655 is 556551166555.

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

It is not a de Polignac number, because 555661155655 - 2³³ = 547071221063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 555661155596 and 555661155605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55566115561 + ... + 55566115570.

It is an arithmetic number, because the mean of its divisors is an integer number (166698346698).

Almost surely, 2^555661155655 is an apocalyptic number.

555661155655 is a deficient number, since it is larger than the sum of its proper divisors (111132231137).

555661155655 is a wasteful number, since it uses less digits than its factorization.

555661155655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111132231136.

The product of its digits is 16875000, while the sum is 55.

The spelling of 555661155655 in words is "five hundred fifty-five billion, six hundred sixty-one million, one hundred fifty-five thousand, six hundred fifty-five".