501507808138 has 8 divisors (see below), whose sum is σ = 759565224288. Its totient is φ = 248319400044.

The previous prime is 501507808121. The next prime is 501507808141. The reversal of 501507808138 is 831808705105.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 1217251756 + ... + 1217252167.

It is an arithmetic number, because the mean of its divisors is an integer number (94945653036).

Almost surely, 2^501507808138 is an apocalyptic number.

501507808138 is a deficient number, since it is larger than the sum of its proper divisors (258057416150).

501507808138 is a wasteful number, since it uses less digits than its factorization.

501507808138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434504028.

The product of its (nonzero) digits is 268800, while the sum is 46.

The spelling of 501507808138 in words is "five hundred one billion, five hundred seven million, eight hundred eight thousand, one hundred thirty-eight".