16006899481 has 4 divisors (see below), whose sum is σ = 16007312932. Its totient is φ = 16006486032.

The previous prime is 16006899439. The next prime is 16006899527. The reversal of 16006899481 is 18499860061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18499860061 = 29 ⋅637926209.

It can be written as a sum of positive squares in 2 ways, for example, as 8260083225 + 7746816256 = 90885^2 + 88016^2 .

It is a cyclic number.

It is not a de Polignac number, because 16006899481 - 2¹³ = 16006891289 is a prime.

It is a super-2 number, since 2×16006899481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16006896481) 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 3 ways as a sum of consecutive naturals, for example, 141870 + ... + 228343.

It is an arithmetic number, because the mean of its divisors is an integer number (4001828233).

Almost surely, 2^16006899481 is an apocalyptic number.

It is an amenable number.

16006899481 is a deficient number, since it is larger than the sum of its proper divisors (413451).

16006899481 is an equidigital number, since it uses as much as digits as its factorization.

16006899481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413450.

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 16006899481 in words is "sixteen billion, six million, eight hundred ninety-nine thousand, four hundred eighty-one".