16555601115 has 24 divisors (see below), whose sum is σ = 28872439440. Its totient is φ = 8775480384.

The previous prime is 16555601099. The next prime is 16555601129. The reversal of 16555601115 is 51110655561.

It is a happy number.

It is not a de Polignac number, because 16555601115 - 2⁴ = 16555601099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16555601115.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1121200 + ... + 1135869.

It is an arithmetic number, because the mean of its divisors is an integer number (1203018310).

Almost surely, 2^16555601115 is an apocalyptic number.

16555601115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16555601115 is a deficient number, since it is larger than the sum of its proper divisors (12316838325).

16555601115 is a wasteful number, since it uses less digits than its factorization.

16555601115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257243 (or 2257240 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 16555601115 in words is "sixteen billion, five hundred fifty-five million, six hundred one thousand, one hundred fifteen".