16555106091 has 8 divisors (see below), whose sum is σ = 22076674560. Its totient is φ = 11035137512.

The previous prime is 16555106059. The next prime is 16555106101. The reversal of 16555106091 is 19060155561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16555106091 - 2⁵ = 16555106059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16555106021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375615 + ... + 417368.

It is an arithmetic number, because the mean of its divisors is an integer number (2759584320).

Almost surely, 2^16555106091 is an apocalyptic number.

16555106091 is a deficient number, since it is larger than the sum of its proper divisors (5521568469).

16555106091 is an equidigital number, since it uses as much as digits as its factorization.

16555106091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799945.

The product of its (nonzero) digits is 40500, while the sum is 39.

The spelling of 16555106091 in words is "sixteen billion, five hundred fifty-five million, one hundred six thousand, ninety-one".