118181589541 has 2 divisors, whose sum is σ = 118181589542. Its totient is φ = 118181589540.

The previous prime is 118181589529. The next prime is 118181589599. The reversal of 118181589541 is 145985181811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106997681025 + 11183908516 = 327105^2 + 105754^2 .

It is a cyclic number.

It is not a de Polignac number, because 118181589541 - 2⁷ = 118181589413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118181589511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59090794770 + 59090794771.

It is an arithmetic number, because the mean of its divisors is an integer number (59090794771).

Almost surely, 2^118181589541 is an apocalyptic number.

It is an amenable number.

118181589541 is a deficient number, since it is larger than the sum of its proper divisors (1).

118181589541 is an equidigital number, since it uses as much as digits as its factorization.

118181589541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460800, while the sum is 52.

The spelling of 118181589541 in words is "one hundred eighteen billion, one hundred eighty-one million, five hundred eighty-nine thousand, five hundred forty-one".