16149891 has 16 divisors (see below), whose sum is σ = 22095360. Its totient is φ = 10489440.

The previous prime is 16149869. The next prime is 16149899. The reversal of 16149891 is 19894161.

It is not a de Polignac number, because 16149891 - 2¹¹ = 16147843 is a prime.

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (16149899) 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, 19261 + ... + 20081.

It is an arithmetic number, because the mean of its divisors is an integer number (1380960).

Almost surely, 2^16149891 is an apocalyptic number.

16149891 is a deficient number, since it is larger than the sum of its proper divisors (5945469).

16149891 is an equidigital number, since it uses as much as digits as its factorization.

16149891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986.

The product of its digits is 15552, while the sum is 39.

The square root of 16149891 is about 4018.6926978807. The cubic root of 16149891 is about 252.7686439221.

The spelling of 16149891 in words is "sixteen million, one hundred forty-nine thousand, eight hundred ninety-one".