1387638900025 has 18 divisors (see below), whose sum is σ = 2001598317150. Its totient is φ = 951523816320.

The previous prime is 1387638900013. The next prime is 1387638900031. The reversal of 1387638900025 is 5200098367831.

It can be written as a sum of positive squares in 3 ways, for example, as 360140413689 + 1027498486336 = 600117^2 + 1013656^2 .

It is not a de Polignac number, because 1387638900025 - 2⁹ = 1387638899513 is a prime.

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 17 ways as a sum of consecutive naturals, for example, 566382000 + ... + 566384449.

Almost surely, 2^{1387638900025} is an apocalyptic number.

It is an amenable number.

1387638900025 is a deficient number, since it is larger than the sum of its proper divisors (613959417125).

1387638900025 is a wasteful number, since it uses less digits than its factorization.

1387638900025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132766473 (or 1132766461 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 1387638900025 in words is "one trillion, three hundred eighty-seven billion, six hundred thirty-eight million, nine hundred thousand, twenty-five".