12652521556 has 12 divisors (see below), whose sum is σ = 22162104468. Its totient is φ = 6320491712.

The previous prime is 12652521547. The next prime is 12652521571. The reversal of 12652521556 is 65512525621.

It can be written as a sum of positive squares in 2 ways, for example, as 3800722500 + 8851799056 = 61650^2 + 94084^2 .

It is a super-2 number, since 2×12652521556² (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 3 ways as a sum of consecutive naturals, for example, 1437331 + ... + 1446106.

It is an arithmetic number, because the mean of its divisors is an integer number (1846842039).

Almost surely, 2^12652521556 is an apocalyptic number.

It is an amenable number.

12652521556 is a deficient number, since it is larger than the sum of its proper divisors (9509582912).

12652521556 is a wasteful number, since it uses less digits than its factorization.

12652521556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884538 (or 2884536 counting only the distinct ones).

The product of its digits is 180000, while the sum is 40.

The spelling of 12652521556 in words is "twelve billion, six hundred fifty-two million, five hundred twenty-one thousand, five hundred fifty-six".