5556055991 has 8 divisors (see below), whose sum is σ = 5891794704. Its totient is φ = 5221307520.

The previous prime is 5556055951. The next prime is 5556055993. The reversal of 5556055991 is 1995506555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5556055991 - 2¹⁰ = 5556054967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5556055993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235985 + ... + 258458.

It is an arithmetic number, because the mean of its divisors is an integer number (736474338).

Almost surely, 2^5556055991 is an apocalyptic number.

5556055991 is a deficient number, since it is larger than the sum of its proper divisors (335738713).

5556055991 is a wasteful number, since it uses less digits than its factorization.

5556055991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495121.

The product of its (nonzero) digits is 1518750, while the sum is 50.

The square root of 5556055991 is about 74538.9561974140. The cubic root of 5556055991 is about 1771.1507929090.

The spelling of 5556055991 in words is "five billion, five hundred fifty-six million, fifty-five thousand, nine hundred ninety-one".