128777518050 has 48 divisors (see below), whose sum is σ = 319499988192. Its totient is φ = 34326505600.

The previous prime is 128777518003. The next prime is 128777518087. The reversal of 128777518050 is 50815777821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 128777517984 and 128777518002.

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, 190297 + ... + 542003.

It is an arithmetic number, because the mean of its divisors is an integer number (6656249754).

Almost surely, 2^128777518050 is an apocalyptic number.

128777518050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128777518050 is an abundant number, since it is smaller than the sum of its proper divisors (190722470142).

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

128777518050 is a wasteful number, since it uses less digits than its factorization.

128777518050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354163 (or 354158 counting only the distinct ones).

The product of its (nonzero) digits is 1097600, while the sum is 51.

The spelling of 128777518050 in words is "one hundred twenty-eight billion, seven hundred seventy-seven million, five hundred eighteen thousand, fifty".