12643437155876 has 6 divisors (see below), whose sum is σ = 22126015022790. Its totient is φ = 6321718577936.

The previous prime is 12643437155863. The next prime is 12643437155891. The reversal of 12643437155876 is 67855173434621.

It can be written as a sum of positive squares in only one way, i.e., 12597459504100 + 45977651776 = 3549290^2 + 214424^2 .

It is a super-2 number, since 2×12643437155876² (a number of 27 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, 1580429644481 + ... + 1580429644488.

It is an arithmetic number, because the mean of its divisors is an integer number (3687669170465).

Almost surely, 2^{12643437155876} is an apocalyptic number.

It is an amenable number.

12643437155876 is a deficient number, since it is larger than the sum of its proper divisors (9482577866914).

12643437155876 is a wasteful number, since it uses less digits than its factorization.

12643437155876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160859288973 (or 3160859288971 counting only the distinct ones).

The product of its digits is 101606400, while the sum is 62.

The spelling of 12643437155876 in words is "twelve trillion, six hundred forty-three billion, four hundred thirty-seven million, one hundred fifty-five thousand, eight hundred seventy-six".