118540645841 has 4 divisors (see below), whose sum is σ = 119872563300. Its totient is φ = 117208728384.

The previous prime is 118540645801. The next prime is 118540645903. The reversal of 118540645841 is 148546045811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38567068225 + 79973577616 = 196385^2 + 282796^2 .

It is a cyclic number.

It is not a de Polignac number, because 118540645841 - 2⁶ = 118540645777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (118540645801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665958596 + ... + 665958773.

It is an arithmetic number, because the mean of its divisors is an integer number (29968140825).

Almost surely, 2^118540645841 is an apocalyptic number.

It is an amenable number.

118540645841 is a deficient number, since it is larger than the sum of its proper divisors (1331917459).

118540645841 is an equidigital number, since it uses as much as digits as its factorization.

118540645841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331917458.

The product of its (nonzero) digits is 614400, while the sum is 47.

The spelling of 118540645841 in words is "one hundred eighteen billion, five hundred forty million, six hundred forty-five thousand, eight hundred forty-one".