538239779808 has 24 divisors (see below), whose sum is σ = 1412879422248. Its totient is φ = 179413259904.

The previous prime is 538239779807. The next prime is 538239779813. The reversal of 538239779808 is 808977932835.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538239779807) 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, 2803332091 + ... + 2803332282.

It is an arithmetic number, because the mean of its divisors is an integer number (58869975927).

Almost surely, 2^538239779808 is an apocalyptic number.

It is an amenable number.

538239779808 is an abundant number, since it is smaller than the sum of its proper divisors (874639642440).

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

538239779808 is a wasteful number, since it uses less digits than its factorization.

538239779808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606664386 (or 5606664378 counting only the distinct ones).

The product of its (nonzero) digits is 182891520, while the sum is 69.

The spelling of 538239779808 in words is "five hundred thirty-eight billion, two hundred thirty-nine million, seven hundred seventy-nine thousand, eight hundred eight".