12787538724 has 81 divisors (see below), whose sum is σ = 33109000561. Its totient is φ = 4161417600.

The previous prime is 12787538681. The next prime is 12787538747. The reversal of 12787538724 is 42783578721.

The square root of 12787538724 is 113082.

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

12787538724 is a `hidden beast` number, since 1 + 2 + 7 + 87 + 538 + 7 + 24 = 666.

12787538724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12660300324 + 127238400 = 112518^2 + 11280^2 .

It is a super-2 number, since 2×12787538724² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 31888924 + ... + 31889324.

Almost surely, 2^12787538724 is an apocalyptic number.

12787538724 is the 113082-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12787538724

12787538724 is an abundant number, since it is smaller than the sum of its proper divisors (20321461837).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12787538724 is an equidigital number, since it uses as much as digits as its factorization.

12787538724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906 (or 453 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 54.

The spelling of 12787538724 in words is "twelve billion, seven hundred eighty-seven million, five hundred thirty-eight thousand, seven hundred twenty-four".