5558778555 has 16 divisors (see below), whose sum is σ = 9702595584. Its totient is φ = 2695165280.

The previous prime is 5558778527. The next prime is 5558778571.

It is a happy number.

5558778555 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5558778555 - 2⁷ = 5558778427 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16844619 + ... + 16844948.

It is an arithmetic number, because the mean of its divisors is an integer number (606412224).

Almost surely, 2^5558778555 is an apocalyptic number.

5558778555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

5558778555 is a deficient number, since it is larger than the sum of its proper divisors (4143817029).

5558778555 is a wasteful number, since it uses less digits than its factorization.

5558778555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33689586.

The product of its digits is 49000000, while the sum is 60.

The square root of 5558778555 is about 74557.2166527158. The cubic root of 5558778555 is about 1771.4400438919.

The spelling of 5558778555 in words is "five billion, five hundred fifty-eight million, seven hundred seventy-eight thousand, five hundred fifty-five".