127661556463 has 12 divisors (see below), whose sum is σ = 151663927392. Its totient is φ = 107096015040.

The previous prime is 127661556437. The next prime is 127661556467. The reversal of 127661556463 is 364655166721.

It is not a de Polignac number, because 127661556463 - 2²⁵ = 127628002031 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 127661556463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127661556467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27714058 + ... + 27718663.

It is an arithmetic number, because the mean of its divisors is an integer number (12638660616).

Almost surely, 2^127661556463 is an apocalyptic number.

127661556463 is a deficient number, since it is larger than the sum of its proper divisors (24002370929).

127661556463 is an equidigital number, since it uses as much as digits as its factorization.

127661556463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55432782 (or 55432775 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 52.

The spelling of 127661556463 in words is "one hundred twenty-seven billion, six hundred sixty-one million, five hundred fifty-six thousand, four hundred sixty-three".