127887778890 has 48 divisors (see below), whose sum is σ = 343974033000. Its totient is φ = 32927427456.

The previous prime is 127887778877. The next prime is 127887778943. The reversal of 127887778890 is 98877788721.

It can be written as a sum of positive squares in 4 ways, for example, as 108834669801 + 19053109089 = 329901^2 + 138033^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24496965 + ... + 24502184.

Almost surely, 2^127887778890 is an apocalyptic number.

127887778890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127887778890 is an abundant number, since it is smaller than the sum of its proper divisors (216086254110).

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

127887778890 is a wasteful number, since it uses less digits than its factorization.

127887778890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48999191 (or 48999188 counting only the distinct ones).

The product of its (nonzero) digits is 177020928, while the sum is 72.

The spelling of 127887778890 in words is "one hundred twenty-seven billion, eight hundred eighty-seven million, seven hundred seventy-eight thousand, eight hundred ninety".