127821773688 has 64 divisors (see below), whose sum is σ = 386687727360. Its totient is φ = 34372240896.

The previous prime is 127821773669. The next prime is 127821773699. The reversal of 127821773688 is 886377128721.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22374906 + ... + 22380617.

It is an arithmetic number, because the mean of its divisors is an integer number (6041995740).

Almost surely, 2^127821773688 is an apocalyptic number.

It is an amenable number.

127821773688 is an abundant number, since it is smaller than the sum of its proper divisors (258865953672).

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

127821773688 is a wasteful number, since it uses less digits than its factorization.

127821773688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44755556 (or 44755552 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 60.

The spelling of 127821773688 in words is "one hundred twenty-seven billion, eight hundred twenty-one million, seven hundred seventy-three thousand, six hundred eighty-eight".