127932808820 has 18 divisors (see below), whose sum is σ = 268662257682. Its totient is φ = 51172483696.

The previous prime is 127932808819. The next prime is 127932808823. The reversal of 127932808820 is 28808239721.

It can be written as a sum of positive squares in only one way, i.e., 102346247056 + 25586561764 = 319916^2 + 159958^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127932808823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1559591 + ... + 1639569.

Almost surely, 2^127932808820 is an apocalyptic number.

127932808820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127932808820 is an abundant number, since it is smaller than the sum of its proper divisors (140729448862).

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

127932808820 is an frugal number, since it uses more digits than its factorization.

127932808820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159967 (or 79986 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 127932808820 in words is "one hundred twenty-seven billion, nine hundred thirty-two million, eight hundred eight thousand, eight hundred twenty".