12636530605 has 8 divisors (see below), whose sum is σ = 15176345112. Its totient is φ = 10100885568.

The previous prime is 12636530573. The next prime is 12636530609. The reversal of 12636530605 is 50603563621.

It can be written as a sum of positive squares in 4 ways, for example, as 96786244 + 12539744361 = 9838^2 + 111981^2 .

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 12636530605 - 2⁵ = 12636530573 is a prime.

It is a super-2 number, since 2×12636530605² (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 (12636530609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035694 + ... + 1047823.

It is an arithmetic number, because the mean of its divisors is an integer number (1897043139).

Almost surely, 2^12636530605 is an apocalyptic number.

It is an amenable number.

12636530605 is a deficient number, since it is larger than the sum of its proper divisors (2539814507).

12636530605 is a wasteful number, since it uses less digits than its factorization.

12636530605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084735.

The product of its (nonzero) digits is 97200, while the sum is 37.

The spelling of 12636530605 in words is "twelve billion, six hundred thirty-six million, five hundred thirty thousand, six hundred five".