500555000091 has 32 divisors (see below), whose sum is σ = 678368452608. Its totient is φ = 328274376480.

The previous prime is 500555000069. The next prime is 500555000173. The reversal of 500555000091 is 190000555005.

It is not a de Polignac number, because 500555000091 - 2⁵ = 500555000059 is a prime.

It is a super-2 number, since 2×500555000091² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (500555000191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26696866 + ... + 26715608.

It is an arithmetic number, because the mean of its divisors is an integer number (21199014144).

Almost surely, 2^500555000091 is an apocalyptic number.

500555000091 is a deficient number, since it is larger than the sum of its proper divisors (177813452517).

500555000091 is a wasteful number, since it uses less digits than its factorization.

500555000091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19431.

The product of its (nonzero) digits is 5625, while the sum is 30.

Adding to 500555000091 its reverse (190000555005), we get a palindrome (690555555096).

The spelling of 500555000091 in words is "five hundred billion, five hundred fifty-five million, ninety-one", and thus it is an aban number.