118155812644 has 9 divisors (see below), whose sum is σ = 206773875217. Its totient is φ = 59077562584.

The previous prime is 118155812641. The next prime is 118155812653. The reversal of 118155812644 is 446218551811.

The square root of 118155812644 is 343738.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 41559715044 + 76596097600 = 203862^2 + 276760^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 118155812594 and 118155812603.

It is not an unprimeable number, because it can be changed into a prime (118155812641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 601542 + ... + 773410.

Almost surely, 2^118155812644 is an apocalyptic number.

118155812644 is the 343738-th square number.

It is an amenable number.

118155812644 is a deficient number, since it is larger than the sum of its proper divisors (88618062573).

118155812644 is an frugal number, since it uses more digits than its factorization.

118155812644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343742 (or 171871 counting only the distinct ones).

The product of its digits is 307200, while the sum is 46.

The spelling of 118155812644 in words is "one hundred eighteen billion, one hundred fifty-five million, eight hundred twelve thousand, six hundred forty-four".