538239779823 has 16 divisors (see below), whose sum is σ = 776035330560. Its totient is φ = 330533563776.

The previous prime is 538239779813. The next prime is 538239779839. The reversal of 538239779823 is 328977932835.

It is not a de Polignac number, because 538239779823 - 2⁴ = 538239779807 is a prime.

It is a super-2 number, since 2×538239779823² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538239779813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112271233 + ... + 112276026.

It is an arithmetic number, because the mean of its divisors is an integer number (48502208160).

Almost surely, 2^538239779823 is an apocalyptic number.

538239779823 is a deficient number, since it is larger than the sum of its proper divisors (237795550737).

538239779823 is a wasteful number, since it uses less digits than its factorization.

538239779823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224547326.

The product of its digits is 137168640, while the sum is 66.

The spelling of 538239779823 in words is "five hundred thirty-eight billion, two hundred thirty-nine million, seven hundred seventy-nine thousand, eight hundred twenty-three".