118280321638 has 8 divisors (see below), whose sum is σ = 178611224400. Its totient is φ = 58743246840.

The previous prime is 118280321597. The next prime is 118280321641. The reversal of 118280321638 is 836123082811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 118280321594 and 118280321603.

It is a congruent number.

It is an unprimeable number.

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, 198456618 + ... + 198457213.

It is an arithmetic number, because the mean of its divisors is an integer number (22326403050).

Almost surely, 2^118280321638 is an apocalyptic number.

118280321638 is a deficient number, since it is larger than the sum of its proper divisors (60330902762).

118280321638 is a wasteful number, since it uses less digits than its factorization.

118280321638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396913982.

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 118280321638 in words is "one hundred eighteen billion, two hundred eighty million, three hundred twenty-one thousand, six hundred thirty-eight".