8355555555551 has 2 divisors, whose sum is σ = 8355555555552. Its totient is φ = 8355555555550.

The previous prime is 8355555555539. The next prime is 8355555555577. The reversal of 8355555555551 is 1555555555538.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8355555555551 - 2¹⁰ = 8355555554527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8355555555521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4177777777775 + 4177777777776.

It is an arithmetic number, because the mean of its divisors is an integer number (4177777777776).

Almost surely, 2^{8355555555551} is an apocalyptic number.

8355555555551 is a deficient number, since it is larger than the sum of its proper divisors (1).

8355555555551 is an equidigital number, since it uses as much as digits as its factorization.

8355555555551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 234375000, while the sum is 62.

The spelling of 8355555555551 in words is "eight trillion, three hundred fifty-five billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-one".