16091745 has 16 divisors (see below), whose sum is σ = 25823232. Its totient is φ = 8556800.

The previous prime is 16091731. The next prime is 16091749. The reversal of 16091745 is 54719061.

16091745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16091745 - 2⁶ = 16091681 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (16091749) 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, 4345 + ... + 7145.

It is an arithmetic number, because the mean of its divisors is an integer number (1613952).

Almost surely, 2^16091745 is an apocalyptic number.

16091745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16091745 is a deficient number, since it is larger than the sum of its proper divisors (9731487).

16091745 is a wasteful number, since it uses less digits than its factorization.

16091745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 16091745 is about 4011.4517322286. The cubic root of 16091745 is about 252.4649234025.

It can be divided in two parts, 16091 and 745, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 16091745 in words is "sixteen million, ninety-one thousand, seven hundred forty-five".