5551611811 has 2 divisors, whose sum is σ = 5551611812. Its totient is φ = 5551611810.

The previous prime is 5551611799. The next prime is 5551611823. The reversal of 5551611811 is 1181161555.

It is a balanced prime because it is at equal distance from previous prime (5551611799) and next prime (5551611823).

It is a cyclic number.

It is not a de Polignac number, because 5551611811 - 2¹⁵ = 5551579043 is a prime.

It is not a weakly prime, because it can be changed into another prime (5551611841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775805905 + 2775805906.

It is an arithmetic number, because the mean of its divisors is an integer number (2775805906).

Almost surely, 2^5551611811 is an apocalyptic number.

5551611811 is the 33322-nd centered decagonal number.

5551611811 is a deficient number, since it is larger than the sum of its proper divisors (1).

5551611811 is an equidigital number, since it uses as much as digits as its factorization.

5551611811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6000, while the sum is 34.

The square root of 5551611811 is about 74509.1391105816. The cubic root of 5551611811 is about 1770.6784307046.

The spelling of 5551611811 in words is "five billion, five hundred fifty-one million, six hundred eleven thousand, eight hundred eleven".