16110991 has 16 divisors (see below), whose sum is σ = 17978688. Its totient is φ = 14342400.

The previous prime is 16110973. The next prime is 16111003. The reversal of 16110991 is 19901161.

It is a cyclic number.

It is not a de Polignac number, because 16110991 - 2¹¹ = 16108943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16110901) 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, 88921 + ... + 89101.

It is an arithmetic number, because the mean of its divisors is an integer number (1123668).

Almost surely, 2^16110991 is an apocalyptic number.

16110991 is a deficient number, since it is larger than the sum of its proper divisors (1867697).

16110991 is a wasteful number, since it uses less digits than its factorization.

16110991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402.

The product of its (nonzero) digits is 486, while the sum is 28.

The square root of 16110991 is about 4013.8498975423. The cubic root of 16110991 is about 252.5655340795.

The spelling of 16110991 in words is "sixteen million, one hundred ten thousand, nine hundred ninety-one".