1238557539025 has 27 divisors (see below), whose sum is σ = 1631592034131. Its totient is φ = 932489744640.

The previous prime is 1238557539019. The next prime is 1238557539029. The reversal of 1238557539025 is 5209357558321.

The square root of 1238557539025 is 1112905.

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

It can be written as a sum of positive squares in 13 ways, for example, as 32373725329 + 1206183813696 = 179927^2 + 1098264^2 .

It is not a de Polignac number, because 1238557539025 - 2³ = 1238557539017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1238557539029) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 94590379 + ... + 94603471.

Almost surely, 2^{1238557539025} is an apocalyptic number.

1238557539025 is the 1112905-th square number.

1238557539025 is the 556453-rd centered octagonal number.

It is an amenable number.

1238557539025 is a deficient number, since it is larger than the sum of its proper divisors (393034495106).

1238557539025 is an frugal number, since it uses more digits than its factorization.

1238557539025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26230 (or 13115 counting only the distinct ones).

The product of its (nonzero) digits is 11340000, while the sum is 55.

The spelling of 1238557539025 in words is "one trillion, two hundred thirty-eight billion, five hundred fifty-seven million, five hundred thirty-nine thousand, twenty-five".