127661159809 has 8 divisors (see below), whose sum is σ = 135613016000. Its totient is φ = 119832588432.

The previous prime is 127661159797. The next prime is 127661159833. The reversal of 127661159809 is 908951166721.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 127661159809 - 2⁵ = 127661159777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127661159809.

It is not an unprimeable number, because it can be changed into a prime (127661159309) 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 7 ways as a sum of consecutive naturals, for example, 30819069 + ... + 30823210.

It is an arithmetic number, because the mean of its divisors is an integer number (16951627000).

Almost surely, 2^127661159809 is an apocalyptic number.

127661159809 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

127661159809 is a deficient number, since it is larger than the sum of its proper divisors (7951856191).

127661159809 is a wasteful number, since it uses less digits than its factorization.

127661159809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61642407.

The product of its (nonzero) digits is 1632960, while the sum is 55.

The spelling of 127661159809 in words is "one hundred twenty-seven billion, six hundred sixty-one million, one hundred fifty-nine thousand, eight hundred nine".