16491851 has 16 divisors (see below), whose sum is σ = 17853696. Its totient is φ = 15196896.

The previous prime is 16491847. The next prime is 16491859. The reversal of 16491851 is 15819461.

It is a cyclic number.

It is not a de Polignac number, because 16491851 - 2² = 16491847 is a prime.

It is a super-2 number, since 2×16491851² = 543962298812402, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (16491859) 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, 101096 + ... + 101258.

It is an arithmetic number, because the mean of its divisors is an integer number (1115856).

Almost surely, 2^16491851 is an apocalyptic number.

16491851 is a deficient number, since it is larger than the sum of its proper divisors (1361845).

16491851 is a wasteful number, since it uses less digits than its factorization.

16491851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322.

The product of its digits is 8640, while the sum is 35.

The square root of 16491851 is about 4061.0160058783. The cubic root of 16491851 is about 254.5402506705.

The spelling of 16491851 in words is "sixteen million, four hundred ninety-one thousand, eight hundred fifty-one".