16056551091 has 32 divisors (see below), whose sum is σ = 26354515968. Its totient is φ = 8493138720.

The previous prime is 16056551059. The next prime is 16056551099. The reversal of 16056551091 is 19015565061.

It is not a de Polignac number, because 16056551091 - 2⁵ = 16056551059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16056551099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 521211 + ... + 551156.

It is an arithmetic number, because the mean of its divisors is an integer number (823578624).

Almost surely, 2^16056551091 is an apocalyptic number.

16056551091 is a deficient number, since it is larger than the sum of its proper divisors (10297964877).

16056551091 is a wasteful number, since it uses less digits than its factorization.

16056551091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072431.

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

The spelling of 16056551091 in words is "sixteen billion, fifty-six million, five hundred fifty-one thousand, ninety-one".