538239478993992 has 320 divisors, whose sum is σ = 1597951150963200. Its totient is φ = 168679537551360.

The previous prime is 538239478993987. The next prime is 538239478994047. The reversal of 538239478993992 is 299399874932835.

538239478993992 is a `hidden beast` number, since 5 + 38 + 2 + 39 + 4 + 78 + 99 + 399 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 45834915273 + ... + 45834927015.

It is an arithmetic number, because the mean of its divisors is an integer number (4993597346760).

Almost surely, 2^{538239478993992} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 538239478993992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (798975575481600).

538239478993992 is an abundant number, since it is smaller than the sum of its proper divisors (1059711671969208).

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

538239478993992 is a wasteful number, since it uses less digits than its factorization.

538239478993992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15858 (or 15845 counting only the distinct ones).

The product of its digits is 57140536320, while the sum is 90.

The spelling of 538239478993992 in words is "five hundred thirty-eight trillion, two hundred thirty-nine billion, four hundred seventy-eight million, nine hundred ninety-three thousand, nine hundred ninety-two".