555505555551 has 8 divisors (see below), whose sum is σ = 740799699504. Its totient is φ = 370274224320.

The previous prime is 555505555499. The next prime is 555505555559. The reversal of 555505555551 is 155555505555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 555505555551 - 2¹⁷ = 555505424479 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 555505555494 and 555505555503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555505555559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15682540 + ... + 15717921.

It is an arithmetic number, because the mean of its divisors is an integer number (92599962438).

Almost surely, 2^555505555551 is an apocalyptic number.

555505555551 is a deficient number, since it is larger than the sum of its proper divisors (185294143953).

555505555551 is a wasteful number, since it uses less digits than its factorization.

555505555551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31406361.

The product of its (nonzero) digits is 9765625, while the sum is 51.

The spelling of 555505555551 in words is "five hundred fifty-five billion, five hundred five million, five hundred fifty-five thousand, five hundred fifty-one".