5005555551 has 12 divisors (see below), whose sum is σ = 7297820712. Its totient is φ = 3305849136.

The previous prime is 5005555547. The next prime is 5005555571. The reversal of 5005555551 is 1555555005.

It is a happy number.

5005555551 is a `hidden beast` number, since 5 + 0 + 0 + 55 + 55 + 551 = 666.

It is not a de Polignac number, because 5005555551 - 2² = 5005555547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5005555501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2597976 + ... + 2599901.

It is an arithmetic number, because the mean of its divisors is an integer number (608151726).

Almost surely, 2^5005555551 is an apocalyptic number.

5005555551 is a deficient number, since it is larger than the sum of its proper divisors (2292265161).

5005555551 is a wasteful number, since it uses less digits than its factorization.

5005555551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197990 (or 5197987 counting only the distinct ones).

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

The square root of 5005555551 is about 70749.9508904423. The cubic root of 5005555551 is about 1710.6090361625.

The spelling of 5005555551 in words is "five billion, five million, five hundred fifty-five thousand, five hundred fifty-one".