16545443131 has 16 divisors (see below), whose sum is σ = 19228042240. Its totient is φ = 13944078720.

The previous prime is 16545443129. The next prime is 16545443149. The reversal of 16545443131 is 13134454561.

It is a cyclic number.

It is not a de Polignac number, because 16545443131 - 2¹ = 16545443129 is a prime.

It is a super-2 number, since 2×16545443131² (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 (16545443111) 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, 71200 + ... + 195346.

It is an arithmetic number, because the mean of its divisors is an integer number (1201752640).

Almost surely, 2^16545443131 is an apocalyptic number.

16545443131 is a deficient number, since it is larger than the sum of its proper divisors (2682599109).

16545443131 is a wasteful number, since it uses less digits than its factorization.

16545443131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124474.

The product of its digits is 86400, while the sum is 37.

Adding to 16545443131 its reverse (13134454561), we get a palindrome (29679897692).

The spelling of 16545443131 in words is "sixteen billion, five hundred forty-five million, four hundred forty-three thousand, one hundred thirty-one".