538643636268 has 36 divisors (see below), whose sum is σ = 1301668772040. Its totient is φ = 173356569344.

The previous prime is 538643636233. The next prime is 538643636269. The reversal of 538643636268 is 862636346835.

It is not an unprimeable number, because it can be changed into a prime (538643636269) 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 11 ways as a sum of consecutive naturals, for example, 26676573 + ... + 26696756.

It is an arithmetic number, because the mean of its divisors is an integer number (36157465890).

Almost surely, 2^538643636268 is an apocalyptic number.

538643636268 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

538643636268 is an abundant number, since it is smaller than the sum of its proper divisors (763025135772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

538643636268 is a wasteful number, since it uses less digits than its factorization.

538643636268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53373394 (or 53373363 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 60.

The spelling of 538643636268 in words is "five hundred thirty-eight billion, six hundred forty-three million, six hundred thirty-six thousand, two hundred sixty-eight".