199415687055 has 16 divisors (see below), whose sum is σ = 343608568800. Its totient is φ = 98173876608.

The previous prime is 199415687021. The next prime is 199415687057. The reversal of 199415687055 is 550786514991.

It is a happy number.

It is not a de Polignac number, because 199415687055 - 2¹⁰ = 199415686031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199415687055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199415687057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511322080 + ... + 511322469.

It is an arithmetic number, because the mean of its divisors is an integer number (21475535550).

Almost surely, 2^199415687055 is an apocalyptic number.

199415687055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

199415687055 is a deficient number, since it is larger than the sum of its proper divisors (144192881745).

199415687055 is a wasteful number, since it uses less digits than its factorization.

199415687055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022644570.

The product of its (nonzero) digits is 13608000, while the sum is 60.

The spelling of 199415687055 in words is "one hundred ninety-nine billion, four hundred fifteen million, six hundred eighty-seven thousand, fifty-five".