128775848818850 has 48 divisors (see below), whose sum is σ = 242222787273960. Its totient is φ = 50929797388800.

The previous prime is 128775848818843. The next prime is 128775848818861. The reversal of 128775848818850 is 58818848577821.

It can be written as a sum of positive squares in 12 ways, for example, as 20243187573049 + 108532661245801 = 4499243^2 + 10417901^2 .

It is a Curzon number.

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, 131110580 + ... + 132089120.

Almost surely, 2^{128775848818850} is an apocalyptic number.

128775848818850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128775848818850 is a deficient number, since it is larger than the sum of its proper divisors (113446938455110).

128775848818850 is a wasteful number, since it uses less digits than its factorization.

128775848818850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008215 (or 1008210 counting only the distinct ones).

The product of its (nonzero) digits is 2569011200, while the sum is 80.

The spelling of 128775848818850 in words is "one hundred twenty-eight trillion, seven hundred seventy-five billion, eight hundred forty-eight million, eight hundred eighteen thousand, eight hundred fifty".