5555555555551 has 2 divisors, whose sum is σ = 5555555555552. Its totient is φ = 5555555555550.

The previous prime is 5555555555521. The next prime is 5555555555593. The reversal of 5555555555551 is 1555555555555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5555555555551 - 2⁵ = 5555555555519 is a prime.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 5555555555551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5555555555521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777777777775 + 2777777777776.

It is an arithmetic number, because the mean of its divisors is an integer number (2777777777776).

Almost surely, 2^{5555555555551} is an apocalyptic number.

5555555555551 is a deficient number, since it is larger than the sum of its proper divisors (1).

5555555555551 is an equidigital number, since it uses as much as digits as its factorization.

5555555555551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244140625, while the sum is 61.

The spelling of 5555555555551 in words is "five trillion, five hundred fifty-five billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-one".