327638045551 has 4 divisors (see below), whose sum is σ = 328243661704.
Its totient is φ = 327032429400.
The previous prime is 327638045549. The next prime is 327638045599. The reversal of 327638045551 is 155540836723.
It is a happy number.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 327638045551 - 21 = 327638045549 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 327638045495 and 327638045504.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (327638045051) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302807265 + ... + 302808346.
It is an arithmetic number, because the mean of its divisors is an integer number (82060915426).
Almost surely, 2327638045551 is an apocalyptic number.
327638045551 is a deficient number, since it is larger than the sum of its proper divisors (605616153).
327638045551 is an equidigital number, since it uses as much as digits as its factorization.
327638045551 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 605616152.
The product of its (nonzero) digits is 3024000, while the sum is 49.
The spelling of 327638045551 in words is "three hundred twenty-seven billion, six hundred thirty-eight million, forty-five thousand, five hundred fifty-one".