127712463881 has 4 divisors (see below), whose sum is σ = 131164152132. Its totient is φ = 124260775632.

The previous prime is 127712463821. The next prime is 127712463899. The reversal of 127712463881 is 188364217721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89829680656 + 37882783225 = 299716^2 + 194635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127712463881 is a prime.

It is a super-2 number, since 2×127712463881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127712463821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1725844070 + ... + 1725844143.

It is an arithmetic number, because the mean of its divisors is an integer number (32791038033).

Almost surely, 2^127712463881 is an apocalyptic number.

It is an amenable number.

127712463881 is a deficient number, since it is larger than the sum of its proper divisors (3451688251).

127712463881 is an equidigital number, since it uses as much as digits as its factorization.

127712463881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451688250.

The product of its digits is 903168, while the sum is 50.

The spelling of 127712463881 in words is "one hundred twenty-seven billion, seven hundred twelve million, four hundred sixty-three thousand, eight hundred eighty-one".