15551505055699 has 2 divisors, whose sum is σ = 15551505055700. Its totient is φ = 15551505055698.

The previous prime is 15551505055649. The next prime is 15551505055717. The reversal of 15551505055699 is 99655050515551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15551505055699 - 2²⁷ = 15551370837971 is a prime.

It is not a weakly prime, because it can be changed into another prime (15551505055649) 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, 7775752527849 + 7775752527850.

It is an arithmetic number, because the mean of its divisors is an integer number (7775752527850).

Almost surely, 2^{15551505055699} is an apocalyptic number.

15551505055699 is a deficient number, since it is larger than the sum of its proper divisors (1).

15551505055699 is an equidigital number, since it uses as much as digits as its factorization.

15551505055699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37968750, while the sum is 61.

The spelling of 15551505055699 in words is "fifteen trillion, five hundred fifty-one billion, five hundred five million, fifty-five thousand, six hundred ninety-nine".