118585672381 has 4 divisors (see below), whose sum is σ = 129366188064. Its totient is φ = 107805156700.

The previous prime is 118585672369. The next prime is 118585672391. The reversal of 118585672381 is 183276585811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183276585811 = 11 ⋅16661507801.

It is a cyclic number.

It is not a de Polignac number, because 118585672381 - 2³¹ = 116438188733 is a prime.

It is a super-2 number, since 2×118585672381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118585672351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5390257825 + ... + 5390257846.

It is an arithmetic number, because the mean of its divisors is an integer number (32341547016).

Almost surely, 2^118585672381 is an apocalyptic number.

118585672381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

118585672381 is a deficient number, since it is larger than the sum of its proper divisors (10780515683).

118585672381 is a wasteful number, since it uses less digits than its factorization.

118585672381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10780515682.

The product of its digits is 3225600, while the sum is 55.

The spelling of 118585672381 in words is "one hundred eighteen billion, five hundred eighty-five million, six hundred seventy-two thousand, three hundred eighty-one".