1538525354117 has 4 divisors (see below), whose sum is σ = 1576050362796. Its totient is φ = 1501000345440.

The previous prime is 1538525354111. The next prime is 1538525354167. The reversal of 1538525354117 is 7114535258351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 151668186916 + 1386857167201 = 389446^2 + 1177649^2 .

It is a cyclic number.

It is not a de Polignac number, because 1538525354117 - 2²⁰ = 1538524305541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538525354111) 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 3 ways as a sum of consecutive naturals, for example, 18762504278 + ... + 18762504359.

It is an arithmetic number, because the mean of its divisors is an integer number (394012590699).

Almost surely, 2^{1538525354117} is an apocalyptic number.

It is an amenable number.

1538525354117 is a deficient number, since it is larger than the sum of its proper divisors (37525008679).

1538525354117 is an equidigital number, since it uses as much as digits as its factorization.

1538525354117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37525008678.

The product of its digits is 2520000, while the sum is 50.

The spelling of 1538525354117 in words is "one trillion, five hundred thirty-eight billion, five hundred twenty-five million, three hundred fifty-four thousand, one hundred seventeen".