127561568447 has 8 divisors (see below), whose sum is σ = 130684246560. Its totient is φ = 124439434240.

The previous prime is 127561568413. The next prime is 127561568467. The reversal of 127561568447 is 744865165721.

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 127561568447 - 2²⁰ = 127560519871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127561568392 and 127561568401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127561568467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360758 + ... + 620700.

It is an arithmetic number, because the mean of its divisors is an integer number (16335530820).

Almost surely, 2^127561568447 is an apocalyptic number.

127561568447 is a deficient number, since it is larger than the sum of its proper divisors (3122678113).

127561568447 is a wasteful number, since it uses less digits than its factorization.

127561568447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271953.

The product of its digits is 11289600, while the sum is 56.

The spelling of 127561568447 in words is "one hundred twenty-seven billion, five hundred sixty-one million, five hundred sixty-eight thousand, four hundred forty-seven".