12722520836 has 6 divisors (see below), whose sum is σ = 22264411470. Its totient is φ = 6361260416.

The previous prime is 12722520827. The next prime is 12722520871. The reversal of 12722520836 is 63802522721.

It can be written as a sum of positive squares in only one way, i.e., 8853680836 + 3868840000 = 94094^2 + 62200^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12722520836.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1590315101 + ... + 1590315108.

It is an arithmetic number, because the mean of its divisors is an integer number (3710735245).

Almost surely, 2^12722520836 is an apocalyptic number.

It is an amenable number.

12722520836 is a deficient number, since it is larger than the sum of its proper divisors (9541890634).

12722520836 is a wasteful number, since it uses less digits than its factorization.

12722520836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180630213 (or 3180630211 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 12722520836 in words is "twelve billion, seven hundred twenty-two million, five hundred twenty thousand, eight hundred thirty-six".