1838166541 has 2 divisors, whose sum is σ = 1838166542. Its totient is φ = 1838166540.

The previous prime is 1838166503. The next prime is 1838166557. The reversal of 1838166541 is 1456618381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1654455625 + 183710916 = 40675^2 + 13554^2 .

It is a cyclic number.

It is not a de Polignac number, because 1838166541 - 2²³ = 1829777933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1838166041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919083270 + 919083271.

It is an arithmetic number, because the mean of its divisors is an integer number (919083271).

Almost surely, 2^1838166541 is an apocalyptic number.

It is an amenable number.

1838166541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838166541 is an equidigital number, since it uses as much as digits as its factorization.

1838166541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 43.

The square root of 1838166541 is about 42873.8444858867. The cubic root of 1838166541 is about 1224.9779901085.

The spelling of 1838166541 in words is "one billion, eight hundred thirty-eight million, one hundred sixty-six thousand, five hundred forty-one".