16001091 has 16 divisors (see below), whose sum is σ = 23927200. Its totient is φ = 10567584.

The previous prime is 16001081. The next prime is 16001107. The reversal of 16001091 is 19010061.

It is not a de Polignac number, because 16001091 - 2¹¹ = 15999043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16001081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225 + ... + 5661.

It is an arithmetic number, because the mean of its divisors is an integer number (1495450).

Almost surely, 2^16001091 is an apocalyptic number.

16001091 is a deficient number, since it is larger than the sum of its proper divisors (7926109).

16001091 is a wasteful number, since it uses less digits than its factorization.

16001091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555 (or 5549 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 16001091 is about 4000.1363726753. The cubic root of 16001091 is about 251.9899372399.

The spelling of 16001091 in words is "sixteen million, one thousand, ninety-one".