555005005551 has 12 divisors (see below), whose sum is σ = 802046276928. Its totient is φ = 369831469344.

The previous prime is 555005005547. The next prime is 555005005553. The reversal of 555005005551 is 155500500555.

It is a happy number.

555005005551 is a `hidden beast` number, since 5 + 5 + 50 + 0 + 50 + 0 + 5 + 551 = 666.

It is not a de Polignac number, because 555005005551 - 2² = 555005005547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555005005553) 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 11 ways as a sum of consecutive naturals, for example, 14301855 + ... + 14340608.

It is an arithmetic number, because the mean of its divisors is an integer number (66837189744).

Almost surely, 2^555005005551 is an apocalyptic number.

555005005551 is a deficient number, since it is larger than the sum of its proper divisors (247041271377).

555005005551 is a wasteful number, since it uses less digits than its factorization.

555005005551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28644622 (or 28644619 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 36.

The spelling of 555005005551 in words is "five hundred fifty-five billion, five million, five thousand, five hundred fifty-one".