12851849956 has 27 divisors (see below), whose sum is σ = 24726022153. Its totient is φ = 5840616320.

The previous prime is 12851849951. The next prime is 12851849981. The reversal of 12851849956 is 65994815821.

The square root of 12851849956 is 113366.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 8116208100 + 4735641856 = 90090^2 + 68816^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12851849956.

It is not an unprimeable number, because it can be changed into a prime (12851849951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2491476 + ... + 2496628.

Almost surely, 2^12851849956 is an apocalyptic number.

12851849956 is the 113366-th square number.

It is an amenable number.

12851849956 is a deficient number, since it is larger than the sum of its proper divisors (11874172197).

12851849956 is an frugal number, since it uses more digits than its factorization.

12851849956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10332 (or 5166 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 58.

The spelling of 12851849956 in words is "twelve billion, eight hundred fifty-one million, eight hundred forty-nine thousand, nine hundred fifty-six".