16801491 has 32 divisors (see below), whose sum is σ = 28546560. Its totient is φ = 8557056.

The previous prime is 16801439. The next prime is 16801493. The reversal of 16801491 is 19410861.

It is not a de Polignac number, because 16801491 - 2⁷ = 16801363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16801493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5545 + ... + 8021.

It is an arithmetic number, because the mean of its divisors is an integer number (892080).

Almost surely, 2^16801491 is an apocalyptic number.

16801491 is a deficient number, since it is larger than the sum of its proper divisors (11745069).

16801491 is a wasteful number, since it uses less digits than its factorization.

16801491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523.

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

The square root of 16801491 is about 4098.9621857246. The cubic root of 16801491 is about 256.1234095334.

The spelling of 16801491 in words is "sixteen million, eight hundred one thousand, four hundred ninety-one".