500005555551 has 12 divisors (see below), whose sum is σ = 764714379312. Its totient is φ = 313728975936.

The previous prime is 500005555523. The next prime is 500005555579. The reversal of 500005555551 is 155555500005.

It is a happy number.

500005555551 is a `hidden beast` number, since 5 + 0 + 0 + 0 + 0 + 55 + 55 + 551 = 666.

It is an interprime number because it is at equal distance from previous prime (500005555523) and next prime (500005555579).

It is not a de Polignac number, because 500005555551 - 2¹⁰ = 500005554527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500005555591) by changing a digit.

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, 1634004931 + ... + 1634005236.

It is an arithmetic number, because the mean of its divisors is an integer number (63726198276).

Almost surely, 2^500005555551 is an apocalyptic number.

500005555551 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

500005555551 is a deficient number, since it is larger than the sum of its proper divisors (264708823761).

500005555551 is a wasteful number, since it uses less digits than its factorization.

500005555551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3268010190 (or 3268010187 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 36.

The spelling of 500005555551 in words is "five hundred billion, five million, five hundred fifty-five thousand, five hundred fifty-one".