1296277885764 has 27 divisors (see below), whose sum is σ = 3276719701437. Its totient is φ = 432090351504.

The previous prime is 1296277885741. The next prime is 1296277885811. The reversal of 1296277885764 is 4675887726921.

It is a happy number.

The square root of 1296277885764 is 1138542.

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

1296277885764 is a `hidden beast` number, since 1 + 29 + 6 + 27 + 7 + 8 + 8 + 576 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1079874288900 + 216403596864 = 1039170^2 + 465192^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1296277885692 and 1296277885701.

It is an unprimeable number.

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, 6736374 + ... + 6926130.

Almost surely, 2^{1296277885764} is an apocalyptic number.

1296277885764 is the 1138542-nd square number.

It is an amenable number.

1296277885764 is an abundant number, since it is smaller than the sum of its proper divisors (1980441815673).

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

1296277885764 is an frugal number, since it uses more digits than its factorization.

1296277885764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379524 (or 189762 counting only the distinct ones).

The product of its digits is 568995840, while the sum is 72.

The spelling of 1296277885764 in words is "one trillion, two hundred ninety-six billion, two hundred seventy-seven million, eight hundred eighty-five thousand, seven hundred sixty-four".