1318879980625 has 45 divisors (see below), whose sum is σ = 1674199273021. Its totient is φ = 1038635570000.

The previous prime is 1318879980623. The next prime is 1318879980659. The reversal of 1318879980625 is 5260899788131.

The square root of 1318879980625 is 1148425.

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

It can be written as a sum of positive squares in 2 ways, for example, as 103400190481 + 1215479790144 = 321559^2 + 1102488^2 .

It is not a de Polignac number, because 1318879980625 - 2¹ = 1318879980623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1318879980623) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2038454052 + ... + 2038454698.

Almost surely, 2^{1318879980625} is an apocalyptic number.

1318879980625 is the 1148425-th square number.

1318879980625 is the 574213-rd centered octagonal number.

It is an amenable number.

1318879980625 is a deficient number, since it is larger than the sum of its proper divisors (355319292396).

1318879980625 is an frugal number, since it uses more digits than its factorization.

1318879980625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456 (or 723 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 67.

The spelling of 1318879980625 in words is "one trillion, three hundred eighteen billion, eight hundred seventy-nine million, nine hundred eighty thousand, six hundred twenty-five".