12695572618 has 16 divisors (see below), whose sum is σ = 19414220616. Its totient is φ = 6224308480.

The previous prime is 12695572597. The next prime is 12695572619. The reversal of 12695572618 is 81627559621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10782122569 + 1913450049 = 103837^2 + 43743^2 .

It is a super-2 number, since 2×12695572618² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12695572619) 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, 147630 + ... + 217222.

Almost surely, 2^12695572618 is an apocalyptic number.

12695572618 is a deficient number, since it is larger than the sum of its proper divisors (6718647998).

12695572618 is a wasteful number, since it uses less digits than its factorization.

12695572618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71369.

The product of its digits is 1814400, while the sum is 52.

The spelling of 12695572618 in words is "twelve billion, six hundred ninety-five million, five hundred seventy-two thousand, six hundred eighteen".