12656364452 has 6 divisors (see below), whose sum is σ = 22148637798. Its totient is φ = 6328182224.

The previous prime is 12656364431. The next prime is 12656364463. The reversal of 12656364452 is 25446365621.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12415307776 + 241056676 = 111424^2 + 15526^2 .

It is a super-2 number, since 2×12656364452² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1582045553 + ... + 1582045560.

It is an arithmetic number, because the mean of its divisors is an integer number (3691439633).

Almost surely, 2^12656364452 is an apocalyptic number.

It is an amenable number.

12656364452 is a deficient number, since it is larger than the sum of its proper divisors (9492273346).

12656364452 is a wasteful number, since it uses less digits than its factorization.

12656364452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3164091117 (or 3164091115 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 44.

The spelling of 12656364452 in words is "twelve billion, six hundred fifty-six million, three hundred sixty-four thousand, four hundred fifty-two".