16091481 has 8 divisors (see below), whose sum is σ = 24520384. Its totient is φ = 9195120.

The previous prime is 16091479. The next prime is 16091497. The reversal of 16091481 is 18419061.

16091481 = T₆₈₃ + T₆₈₄ + ... + T₇₄₅.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16091481 - 2¹ = 16091479 is a prime.

It is a super-2 number, since 2×16091481² = 517871521546722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16091441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383110 + ... + 383151.

It is an arithmetic number, because the mean of its divisors is an integer number (3065048).

Almost surely, 2^16091481 is an apocalyptic number.

It is an amenable number.

16091481 is a deficient number, since it is larger than the sum of its proper divisors (8428903).

16091481 is an equidigital number, since it uses as much as digits as its factorization.

16091481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766271.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 16091481 is about 4011.4188263007. The cubic root of 16091481 is about 252.4635427545.

The spelling of 16091481 in words is "sixteen million, ninety-one thousand, four hundred eighty-one".