127655820018 has 80 divisors (see below), whose sum is σ = 295714831104. Its totient is φ = 41117375520.

The previous prime is 127655820001. The next prime is 127655820031. The reversal of 127655820018 is 810028556721.

127655820018 is a `hidden beast` number, since 1 + 2 + 7 + 65 + 582 + 0 + 0 + 1 + 8 = 666.

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, 3381121 + ... + 3418667.

Almost surely, 2^127655820018 is an apocalyptic number.

127655820018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 127655820018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147857415552).

127655820018 is an abundant number, since it is smaller than the sum of its proper divisors (168059011086).

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

127655820018 is a wasteful number, since it uses less digits than its factorization.

127655820018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38269 (or 38260 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The spelling of 127655820018 in words is "one hundred twenty-seven billion, six hundred fifty-five million, eight hundred twenty thousand, eighteen".