500538778338 has 32 divisors (see below), whose sum is σ = 1007257208256. Its totient is φ = 165819483648.

The previous prime is 500538778331. The next prime is 500538778339. The reversal of 500538778338 is 833877835005.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (500538778331) 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, 237445 + ... + 1028327.

It is an arithmetic number, because the mean of its divisors is an integer number (31476787758).

Almost surely, 2^500538778338 is an apocalyptic number.

500538778338 is an abundant number, since it is smaller than the sum of its proper divisors (506718429918).

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

500538778338 is a wasteful number, since it uses less digits than its factorization.

500538778338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791538.

The product of its (nonzero) digits is 16934400, while the sum is 57.

The spelling of 500538778338 in words is "five hundred billion, five hundred thirty-eight million, seven hundred seventy-eight thousand, three hundred thirty-eight".