502638805420 has 12 divisors (see below), whose sum is σ = 1055541491424. Its totient is φ = 201055522160.

The previous prime is 502638805379. The next prime is 502638805421. The reversal of 502638805420 is 24508836205.

It is not an unprimeable number, because it can be changed into a prime (502638805421) 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 3 ways as a sum of consecutive naturals, for example, 12565970116 + ... + 12565970155.

It is an arithmetic number, because the mean of its divisors is an integer number (87961790952).

Almost surely, 2^502638805420 is an apocalyptic number.

It is an amenable number.

502638805420 is an abundant number, since it is smaller than the sum of its proper divisors (552902686004).

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

502638805420 is a wasteful number, since it uses less digits than its factorization.

502638805420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25131940280 (or 25131940278 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 43.

The spelling of 502638805420 in words is "five hundred two billion, six hundred thirty-eight million, eight hundred five thousand, four hundred twenty".