16485881 has 2 divisors, whose sum is σ = 16485882. Its totient is φ = 16485880.

The previous prime is 16485857. The next prime is 16485907. The reversal of 16485881 is 18858461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13388281 + 3097600 = 3659^2 + 1760^2 .

It is a cyclic number.

It is not a de Polignac number, because 16485881 - 2¹⁰ = 16484857 is a prime.

It is a super-2 number, since 2×16485881² = 543568544692322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16485851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8242940 + 8242941.

It is an arithmetic number, because the mean of its divisors is an integer number (8242941).

Almost surely, 2^16485881 is an apocalyptic number.

It is an amenable number.

16485881 is a deficient number, since it is larger than the sum of its proper divisors (1).

16485881 is an equidigital number, since it uses as much as digits as its factorization.

16485881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61440, while the sum is 41.

The square root of 16485881 is about 4060.2809016126. The cubic root of 16485881 is about 254.5095326976.

The spelling of 16485881 in words is "sixteen million, four hundred eighty-five thousand, eight hundred eighty-one".