5551511811 has 16 divisors (see below), whose sum is σ = 7541560224. Its totient is φ = 3631751424.

The previous prime is 5551511803. The next prime is 5551511813. The reversal of 5551511811 is 1181151555.

5551511811 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5551511811 - 2³ = 5551511803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5551511813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21196 + ... + 107481.

It is an arithmetic number, because the mean of its divisors is an integer number (471347514).

Almost surely, 2^5551511811 is an apocalyptic number.

5551511811 is a deficient number, since it is larger than the sum of its proper divisors (1990048413).

5551511811 is a wasteful number, since it uses less digits than its factorization.

5551511811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128950.

The product of its digits is 5000, while the sum is 33.

The square root of 5551511811 is about 74508.4680489406. The cubic root of 5551511811 is about 1770.6677990231.

The spelling of 5551511811 in words is "five billion, five hundred fifty-one million, five hundred eleven thousand, eight hundred eleven".