118931661055 has 16 divisors (see below), whose sum is σ = 149059782144. Its totient is φ = 90925061920.

The previous prime is 118931661053. The next prime is 118931661067. The reversal of 118931661055 is 550166139811.

It is a happy number.

It is not a de Polignac number, because 118931661055 - 2¹ = 118931661053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 118931660996 and 118931661014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118931661053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348499 + ... + 599428.

It is an arithmetic number, because the mean of its divisors is an integer number (9316236384).

Almost surely, 2^118931661055 is an apocalyptic number.

118931661055 is a deficient number, since it is larger than the sum of its proper divisors (30128121089).

118931661055 is a wasteful number, since it uses less digits than its factorization.

118931661055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949046.

The product of its (nonzero) digits is 194400, while the sum is 46.

The spelling of 118931661055 in words is "one hundred eighteen billion, nine hundred thirty-one million, six hundred sixty-one thousand, fifty-five".