12626550644 has 6 divisors (see below), whose sum is σ = 22096463634. Its totient is φ = 6313275320.

The previous prime is 12626550637. The next prime is 12626550667. The reversal of 12626550644 is 44605562621.

It can be written as a sum of positive squares in only one way, i.e., 9475075600 + 3151475044 = 97340^2 + 56138^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1578318827 + ... + 1578318834.

It is an arithmetic number, because the mean of its divisors is an integer number (3682743939).

Almost surely, 2^12626550644 is an apocalyptic number.

It is an amenable number.

12626550644 is a deficient number, since it is larger than the sum of its proper divisors (9469912990).

12626550644 is a wasteful number, since it uses less digits than its factorization.

12626550644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156637665 (or 3156637663 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 12626550644 in words is "twelve billion, six hundred twenty-six million, five hundred fifty thousand, six hundred forty-four".