16506131204 has 12 divisors (see below), whose sum is σ = 28888869324. Its totient is φ = 8252168544.

The previous prime is 16506131183. The next prime is 16506131219. The reversal of 16506131204 is 40213160561.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2393166400 + 14112964804 = 48920^2 + 118798^2 .

It is an unprimeable number.

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, 181979 + ... + 257154.

It is an arithmetic number, because the mean of its divisors is an integer number (2407405777).

Almost surely, 2^16506131204 is an apocalyptic number.

It is an amenable number.

16506131204 is a deficient number, since it is larger than the sum of its proper divisors (12382738120).

16506131204 is a wasteful number, since it uses less digits than its factorization.

16506131204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448534 (or 448532 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 16506131204 its reverse (40213160561), we get a palindrome (56719291765).

The spelling of 16506131204 in words is "sixteen billion, five hundred six million, one hundred thirty-one thousand, two hundred four".