18110227131761 has 2 divisors, whose sum is σ = 18110227131762. Its totient is φ = 18110227131760.

The previous prime is 18110227131649. The next prime is 18110227131767. The reversal of 18110227131761 is 16713172201181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13383707640625 + 4726519491136 = 3658375^2 + 2174056^2 .

It is a cyclic number.

It is not a de Polignac number, because 18110227131761 - 2¹⁴ = 18110227115377 is a prime.

It is a super-2 number, since 2×18110227131761² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18110227131767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9055113565880 + 9055113565881.

It is an arithmetic number, because the mean of its divisors is an integer number (9055113565881).

Almost surely, 2^{18110227131761} is an apocalyptic number.

It is an amenable number.

18110227131761 is a deficient number, since it is larger than the sum of its proper divisors (1).

18110227131761 is an equidigital number, since it uses as much as digits as its factorization.

18110227131761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 41.

The spelling of 18110227131761 in words is "eighteen trillion, one hundred ten billion, two hundred twenty-seven million, one hundred thirty-one thousand, seven hundred sixty-one".