13156816469 has 4 divisors (see below), whose sum is σ = 13168921344. Its totient is φ = 13144711596.

The previous prime is 13156816459. The next prime is 13156816481. The reversal of 13156816469 is 96461865131.

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: 96461865131 = 6673 ⋅14455547.

It is a cyclic number.

It is not a de Polignac number, because 13156816469 - 2³² = 8861849173 is a prime.

It is a super-2 number, since 2×13156816469² (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 (13156816429) 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, 6050807 + ... + 6052980.

It is an arithmetic number, because the mean of its divisors is an integer number (3292230336).

Almost surely, 2^13156816469 is an apocalyptic number.

It is an amenable number.

13156816469 is a deficient number, since it is larger than the sum of its proper divisors (12104875).

13156816469 is a wasteful number, since it uses less digits than its factorization.

13156816469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12104874.

The product of its digits is 933120, while the sum is 50.

The spelling of 13156816469 in words is "thirteen billion, one hundred fifty-six million, eight hundred sixteen thousand, four hundred sixty-nine".