16432850681 has 4 divisors (see below), whose sum is σ = 17696916132. Its totient is φ = 15168785232.

The previous prime is 16432850677. The next prime is 16432850689. The reversal of 16432850681 is 18605823461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18605823461 = 97 ⋅191812613.

It can be written as a sum of positive squares in 2 ways, for example, as 5571876025 + 10860974656 = 74645^2 + 104216^2 .

It is a cyclic number.

It is not a de Polignac number, because 16432850681 - 2² = 16432850677 is a prime.

It is a super-2 number, since 2×16432850681² (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 (16432850689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 632032706 + ... + 632032731.

It is an arithmetic number, because the mean of its divisors is an integer number (4424229033).

Almost surely, 2^16432850681 is an apocalyptic number.

It is an amenable number.

16432850681 is a deficient number, since it is larger than the sum of its proper divisors (1264065451).

16432850681 is a wasteful number, since it uses less digits than its factorization.

16432850681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264065450.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 16432850681 in words is "sixteen billion, four hundred thirty-two million, eight hundred fifty thousand, six hundred eighty-one".