500091009100 has 36 divisors (see below), whose sum is σ = 1086030618064. Its totient is φ = 199882831680.

The previous prime is 500091009049. The next prime is 500091009127. The reversal of 500091009100 is 1900190005.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1788699 + ... + 2049298.

Almost surely, 2^500091009100 is an apocalyptic number.

500091009100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

500091009100 is an abundant number, since it is smaller than the sum of its proper divisors (585939608964).

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

500091009100 is a wasteful number, since it uses less digits than its factorization.

500091009100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3839314 (or 3839307 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 25.

Adding to 500091009100 its reverse (1900190005), we get a palindrome (501991199105).

The spelling of 500091009100 in words is "five hundred billion, ninety-one million, nine thousand, one hundred".