16131816869 has 4 divisors (see below), whose sum is σ = 18436362144. Its totient is φ = 13827271596.

The previous prime is 16131816853. The next prime is 16131816871. The reversal of 16131816869 is 96861813161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96861813161 = 62801 ⋅1542361.

It is a cyclic number.

It is not a de Polignac number, because 16131816869 - 2⁴ = 16131816853 is a prime.

It is a super-2 number, since 2×16131816869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16131816809) 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, 1152272627 + ... + 1152272640.

It is an arithmetic number, because the mean of its divisors is an integer number (4609090536).

Almost surely, 2^16131816869 is an apocalyptic number.

It is an amenable number.

16131816869 is a deficient number, since it is larger than the sum of its proper divisors (2304545275).

16131816869 is an equidigital number, since it uses as much as digits as its factorization.

16131816869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304545274.

The product of its digits is 373248, while the sum is 50.

The spelling of 16131816869 in words is "sixteen billion, one hundred thirty-one million, eight hundred sixteen thousand, eight hundred sixty-nine".