538401136580161 has 4 divisors (see below), whose sum is σ = 541704211037872. Its totient is φ = 535098062122452.

The previous prime is 538401136580119. The next prime is 538401136580189. The reversal of 538401136580161 is 161085631104835.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 538401136580161 - 2¹¹ = 538401136578113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 538401136580099 and 538401136580108.

It is not an unprimeable number, because it can be changed into a prime (538401136583161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1651537228611 + ... + 1651537228936.

It is an arithmetic number, because the mean of its divisors is an integer number (135426052759468).

Almost surely, 2^{538401136580161} is an apocalyptic number.

It is an amenable number.

538401136580161 is a deficient number, since it is larger than the sum of its proper divisors (3303074457711).

538401136580161 is a wasteful number, since it uses less digits than its factorization.

538401136580161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3303074457710.

The product of its (nonzero) digits is 2073600, while the sum is 52.

Adding to 538401136580161 its reverse (161085631104835), we get a palindrome (699486767684996).

The spelling of 538401136580161 in words is "five hundred thirty-eight trillion, four hundred one billion, one hundred thirty-six million, five hundred eighty thousand, one hundred sixty-one".