1551110011811 has 2 divisors, whose sum is σ = 1551110011812. Its totient is φ = 1551110011810.

The previous prime is 1551110011777. The next prime is 1551110011831. The reversal of 1551110011811 is 1181100111551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1551110011811 - 2¹⁴ = 1551109995427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1551110011831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775555005905 + 775555005906.

It is an arithmetic number, because the mean of its divisors is an integer number (775555005906).

Almost surely, 2^{1551110011811} is an apocalyptic number.

1551110011811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551110011811 is an equidigital number, since it uses as much as digits as its factorization.

1551110011811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200, while the sum is 26.

The spelling of 1551110011811 in words is "one trillion, five hundred fifty-one billion, one hundred ten million, eleven thousand, eight hundred eleven".