127971987480 has 160 divisors (see below), whose sum is σ = 434563446240. Its totient is φ = 33773967360.

The previous prime is 127971987463. The next prime is 127971987509. The reversal of 127971987480 is 84789179721.

127971987480 is a `hidden beast` number, since 1 + 2 + 7 + 9 + 71 + 9 + 87 + 480 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 110685 + ... + 517875.

It is an arithmetic number, because the mean of its divisors is an integer number (2716021539).

Almost surely, 2^127971987480 is an apocalyptic number.

127971987480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 127971987480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217281723120).

127971987480 is an abundant number, since it is smaller than the sum of its proper divisors (306591458760).

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

127971987480 is a wasteful number, since it uses less digits than its factorization.

127971987480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407311 (or 407298 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 63.

The spelling of 127971987480 in words is "one hundred twenty-seven billion, nine hundred seventy-one million, nine hundred eighty-seven thousand, four hundred eighty".