12807969505 has 8 divisors (see below), whose sum is σ = 15380864424. Its totient is φ = 10238841600.

The previous prime is 12807969481. The next prime is 12807969529. The reversal of 12807969505 is 50596970821.

It is an interprime number because it is at equal distance from previous prime (12807969481) and next prime (12807969529).

It can be written as a sum of positive squares in 4 ways, for example, as 2919457024 + 9888512481 = 54032^2 + 99441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12807969505 - 2²³ = 12799580897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 934266 + ... + 947875.

It is an arithmetic number, because the mean of its divisors is an integer number (1922608053).

Almost surely, 2^12807969505 is an apocalyptic number.

It is an amenable number.

12807969505 is a deficient number, since it is larger than the sum of its proper divisors (2572894919).

12807969505 is a wasteful number, since it uses less digits than its factorization.

12807969505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883507.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 12807969505 in words is "twelve billion, eight hundred seven million, nine hundred sixty-nine thousand, five hundred five".