127971215442 has 96 divisors (see below), whose sum is σ = 331137259200. Its totient is φ = 36527029056.

The previous prime is 127971215381. The next prime is 127971215467. The reversal of 127971215442 is 244512179721.

127971215442 is a `hidden beast` number, since 1 + 2 + 7 + 97 + 12 + 1 + 544 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2709909 + ... + 2756727.

It is an arithmetic number, because the mean of its divisors is an integer number (3449346450).

Almost surely, 2^127971215442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 127971215442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165568629600).

127971215442 is an abundant number, since it is smaller than the sum of its proper divisors (203166043758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127971215442 is a wasteful number, since it uses less digits than its factorization.

127971215442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47877 (or 47864 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

It can be divided in two parts, 1279 and 71215442, that added together give a square (71216721 = 8439²).

The spelling of 127971215442 in words is "one hundred twenty-seven billion, nine hundred seventy-one million, two hundred fifteen thousand, four hundred forty-two".