118555573761 has 9 divisors (see below), whose sum is σ = 171248431939. Its totient is φ = 79036360536.

The previous prime is 118555573729. The next prime is 118555573769. The reversal of 118555573761 is 167375555811.

It is a happy number.

The square root of 118555573761 is 344319.

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

118555573761 is a `hidden beast` number, since 1 + 1 + 8 + 5 + 5 + 5 + 573 + 7 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 116379911025 + 2175662736 = 341145^2 + 46644^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 118555573761 - 2⁵ = 118555573729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 118555573698 and 118555573707.

It is not an unprimeable number, because it can be changed into a prime (118555573769) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 975571 + ... + 1090343.

Almost surely, 2^118555573761 is an apocalyptic number.

118555573761 is the 344319-th square number.

118555573761 is the 172160-th centered octagonal number.

It is an amenable number.

118555573761 is a deficient number, since it is larger than the sum of its proper divisors (52692858178).

118555573761 is an frugal number, since it uses more digits than its factorization.

118555573761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229552 (or 114776 counting only the distinct ones).

The product of its digits is 4410000, while the sum is 54.

The spelling of 118555573761 in words is "one hundred eighteen billion, five hundred fifty-five million, five hundred seventy-three thousand, seven hundred sixty-one".