12695565540 has 192 divisors, whose sum is σ = 43808163840. Its totient is φ = 2681994240.

The previous prime is 12695565529. The next prime is 12695565577. The reversal of 12695565540 is 4556559621.

It is a super-2 number, since 2×12695565540² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12695565540.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 307779 + ... + 346581.

It is an arithmetic number, because the mean of its divisors is an integer number (228167520).

Almost surely, 2^12695565540 is an apocalyptic number.

12695565540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12695565540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21904081920).

12695565540 is an abundant number, since it is smaller than the sum of its proper divisors (31112598300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12695565540 is a wasteful number, since it uses less digits than its factorization.

12695565540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38882 (or 38880 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 48.

The spelling of 12695565540 in words is "twelve billion, six hundred ninety-five million, five hundred sixty-five thousand, five hundred forty".