12695469551 has 4 divisors (see below), whose sum is σ = 13247446512. Its totient is φ = 12143492592.

The previous prime is 12695469539. The next prime is 12695469581. The reversal of 12695469551 is 15596459621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12695469551 - 2²⁶ = 12628360687 is a prime.

It is a super-2 number, since 2×12695469551² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12695469493 and 12695469502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12695469581) 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, 275988446 + ... + 275988491.

It is an arithmetic number, because the mean of its divisors is an integer number (3311861628).

Almost surely, 2^12695469551 is an apocalyptic number.

12695469551 is a deficient number, since it is larger than the sum of its proper divisors (551976961).

12695469551 is an equidigital number, since it uses as much as digits as its factorization.

12695469551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551976960.

The product of its digits is 2916000, while the sum is 53.

The spelling of 12695469551 in words is "twelve billion, six hundred ninety-five million, four hundred sixty-nine thousand, five hundred fifty-one".