12609885977 has 4 divisors (see below), whose sum is σ = 13579877220. Its totient is φ = 11639894736.

The previous prime is 12609885961. The next prime is 12609886001. The reversal of 12609885977 is 77958890621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5981320921 + 6628565056 = 77339^2 + 81416^2 .

It is a cyclic number.

It is not a de Polignac number, because 12609885977 - 2⁴ = 12609885961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12609855977) 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, 484995602 + ... + 484995627.

It is an arithmetic number, because the mean of its divisors is an integer number (3394969305).

Almost surely, 2^12609885977 is an apocalyptic number.

It is an amenable number.

12609885977 is a deficient number, since it is larger than the sum of its proper divisors (969991243).

12609885977 is an equidigital number, since it uses as much as digits as its factorization.

12609885977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969991242.

The product of its (nonzero) digits is 15240960, while the sum is 62.

The spelling of 12609885977 in words is "twelve billion, six hundred nine million, eight hundred eighty-five thousand, nine hundred seventy-seven".