538663385438135 has 4 divisors (see below), whose sum is σ = 646396062525768. Its totient is φ = 430930708350504.

The previous prime is 538663385438099. The next prime is 538663385438173. The reversal of 538663385438135 is 531834583366835.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538663385438135 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53866338543809 + ... + 53866338543818.

It is an arithmetic number, because the mean of its divisors is an integer number (161599015631442).

Almost surely, 2^{538663385438135} is an apocalyptic number.

538663385438135 is a deficient number, since it is larger than the sum of its proper divisors (107732677087633).

538663385438135 is a wasteful number, since it uses less digits than its factorization.

538663385438135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107732677087632.

The product of its digits is 2239488000, while the sum is 71.

The spelling of 538663385438135 in words is "five hundred thirty-eight trillion, six hundred sixty-three billion, three hundred eighty-five million, four hundred thirty-eight thousand, one hundred thirty-five".