12608591965 has 8 divisors (see below), whose sum is σ = 15142056120. Its totient is φ = 10079043072.

The previous prime is 12608591951. The next prime is 12608591993. The reversal of 12608591965 is 56919580621.

It can be written as a sum of positive squares in 4 ways, for example, as 3619466244 + 8989125721 = 60162^2 + 94811^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12608591965 - 2⁹ = 12608591453 is a prime.

It is a super-2 number, since 2×12608591965² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971724 + ... + 984613.

It is an arithmetic number, because the mean of its divisors is an integer number (1892757015).

Almost surely, 2^12608591965 is an apocalyptic number.

It is an amenable number.

12608591965 is a deficient number, since it is larger than the sum of its proper divisors (2533464155).

12608591965 is a wasteful number, since it uses less digits than its factorization.

12608591965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957631.

The product of its (nonzero) digits is 1166400, while the sum is 52.

The spelling of 12608591965 in words is "twelve billion, six hundred eight million, five hundred ninety-one thousand, nine hundred sixty-five".