16131272505 has 16 divisors (see below), whose sum is σ = 25849943424. Its totient is φ = 8590042880.

The previous prime is 16131272503. The next prime is 16131272513. The reversal of 16131272505 is 50527213161.

It is not a de Polignac number, because 16131272505 - 2¹ = 16131272503 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16131272503) 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, 821376 + ... + 840785.

It is an arithmetic number, because the mean of its divisors is an integer number (1615621464).

Almost surely, 2^16131272505 is an apocalyptic number.

16131272505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16131272505 is a deficient number, since it is larger than the sum of its proper divisors (9718670919).

16131272505 is a wasteful number, since it uses less digits than its factorization.

16131272505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662816.

The product of its (nonzero) digits is 12600, while the sum is 33.

Adding to 16131272505 its reverse (50527213161), we get a palindrome (66658485666).

The spelling of 16131272505 in words is "sixteen billion, one hundred thirty-one million, two hundred seventy-two thousand, five hundred five".