538643121161617 has 4 divisors (see below), whose sum is σ = 538644335894896. Its totient is φ = 538641906428340.

The previous prime is 538643121161533. The next prime is 538643121161627. The reversal of 538643121161617 is 716161121346835.

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 538643121161617 - 2¹¹ = 538643121159569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538643121161627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606701259 + ... + 607588432.

It is an arithmetic number, because the mean of its divisors is an integer number (134661083973724).

Almost surely, 2^{538643121161617} is an apocalyptic number.

It is an amenable number.

538643121161617 is a deficient number, since it is larger than the sum of its proper divisors (1214733279).

538643121161617 is a wasteful number, since it uses less digits than its factorization.

538643121161617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214733278.

The product of its digits is 4354560, while the sum is 55.

The spelling of 538643121161617 in words is "five hundred thirty-eight trillion, six hundred forty-three billion, one hundred twenty-one million, one hundred sixty-one thousand, six hundred seventeen".