12565135606 has 4 divisors (see below), whose sum is σ = 18847703412. Its totient is φ = 6282567802.

The previous prime is 12565135577. The next prime is 12565135663. The reversal of 12565135606 is 60653156521.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3141283900 + ... + 3141283903.

It is an arithmetic number, because the mean of its divisors is an integer number (4711925853).

Almost surely, 2^12565135606 is an apocalyptic number.

12565135606 is a deficient number, since it is larger than the sum of its proper divisors (6282567806).

12565135606 is an equidigital number, since it uses as much as digits as its factorization.

12565135606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6282567805.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 12565135606 in words is "twelve billion, five hundred sixty-five million, one hundred thirty-five thousand, six hundred six".