127990989984 has 288 divisors, whose sum is σ = 397944187200. Its totient is φ = 35705978880.

The previous prime is 127990989953. The next prime is 127990990007. The reversal of 127990989984 is 489989099721.

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, 90837472 + ... + 90838880.

It is an arithmetic number, because the mean of its divisors is an integer number (1381750650).

Almost surely, 2^127990989984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 127990989984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198972093600).

127990989984 is an abundant number, since it is smaller than the sum of its proper divisors (269953197216).

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

127990989984 is a wasteful number, since it uses less digits than its factorization.

127990989984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968 (or 1947 counting only the distinct ones).

The product of its (nonzero) digits is 211631616, while the sum is 75.

The spelling of 127990989984 in words is "one hundred twenty-seven billion, nine hundred ninety million, nine hundred eighty-nine thousand, nine hundred eighty-four".