2539138325525 has 6 divisors (see below), whose sum is σ = 3148531523682. Its totient is φ = 2031310660400.

The previous prime is 2539138325497. The next prime is 2539138325561. The reversal of 2539138325525 is 5255238319352.

It can be written as a sum of positive squares in 3 ways, for example, as 524629321969 + 2014509003556 = 724313^2 + 1419334^2 .

It is not a de Polignac number, because 2539138325525 - 2¹⁰ = 2539138324501 is a prime.

It is a super-2 number, since 2×2539138325525² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 50782766486 + ... + 50782766535.

It is an arithmetic number, because the mean of its divisors is an integer number (524755253947).

Almost surely, 2^{2539138325525} is an apocalyptic number.

2539138325525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2539138325525 is a deficient number, since it is larger than the sum of its proper divisors (609393198157).

2539138325525 is a wasteful number, since it uses less digits than its factorization.

2539138325525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101565533031 (or 101565533026 counting only the distinct ones).

The product of its digits is 9720000, while the sum is 53.

The spelling of 2539138325525 in words is "two trillion, five hundred thirty-nine billion, one hundred thirty-eight million, three hundred twenty-five thousand, five hundred twenty-five".