1275648266916 has 135 divisors (see below), whose sum is σ = 3543460168017. Its totient is φ = 400094951040.

The previous prime is 1275648266897. The next prime is 1275648266923. The reversal of 1275648266916 is 6196628465721.

The square root of 1275648266916 is 1129446.

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

1275648266916 is a `hidden beast` number, since 1 + 2 + 7 + 5 + 6 + 482 + 66 + 91 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 993151764900 + 282496502016 = 996570^2 + 531504^2 .

It is a super-3 number, since 3×1275648266916³ (a number of 37 digits) contains 333 as substring.

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 44 ways as a sum of consecutive naturals, for example, 345608631 + ... + 345612321.

Almost surely, 2^{1275648266916} is an apocalyptic number.

1275648266916 is the 1129446-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1275648266916

1275648266916 is an abundant number, since it is smaller than the sum of its proper divisors (2267811901101).

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

1275648266916 is an frugal number, since it uses more digits than its factorization.

1275648266916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7432 (or 3713 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

It can be divided in two parts, 1275648 and 266916, that added together give a square (1542564 = 1242²).

The spelling of 1275648266916 in words is "one trillion, two hundred seventy-five billion, six hundred forty-eight million, two hundred sixty-six thousand, nine hundred sixteen".