16281318897 has 40 divisors (see below), whose sum is σ = 25814527200. Its totient is φ = 10190987136.

The previous prime is 16281318857. The next prime is 16281318901. The reversal of 16281318897 is 79881318261.

16281318897 is a `hidden beast` number, since 1 + 628 + 1 + 3 + 1 + 8 + 8 + 9 + 7 = 666.

It is not a de Polignac number, because 16281318897 - 2²⁴ = 16264541681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16281318827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 562854 + ... + 591072.

It is an arithmetic number, because the mean of its divisors is an integer number (645363180).

Almost surely, 2^16281318897 is an apocalyptic number.

16281318897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16281318897 is a deficient number, since it is larger than the sum of its proper divisors (9533208303).

16281318897 is a wasteful number, since it uses less digits than its factorization.

16281318897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28667 (or 28658 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The spelling of 16281318897 in words is "sixteen billion, two hundred eighty-one million, three hundred eighteen thousand, eight hundred ninety-seven".