16465132505 has 16 divisors (see below), whose sum is σ = 20216898000. Its totient is φ = 12869180160.

The previous prime is 16465132493. The next prime is 16465132507. The reversal of 16465132505 is 50523156461.

It can be written as a sum of positive squares in 8 ways, for example, as 3764067904 + 12701064601 = 61352^2 + 112699^2 .

It is not a de Polignac number, because 16465132505 - 2¹⁸ = 16464870361 is a prime.

It is a super-2 number, since 2×16465132505² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16465132507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135710 + ... + 226599.

It is an arithmetic number, because the mean of its divisors is an integer number (1263556125).

Almost surely, 2^16465132505 is an apocalyptic number.

It is an amenable number.

16465132505 is a deficient number, since it is larger than the sum of its proper divisors (3751765495).

16465132505 is a wasteful number, since it uses less digits than its factorization.

16465132505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362524.

The product of its (nonzero) digits is 108000, while the sum is 38.

Adding to 16465132505 its reverse (50523156461), we get a palindrome (66988288966).

The spelling of 16465132505 in words is "sixteen billion, four hundred sixty-five million, one hundred thirty-two thousand, five hundred five".