128782477950 has 48 divisors (see below), whose sum is σ = 365006340480. Its totient is φ = 29435994720.

The previous prime is 128782477949. The next prime is 128782477963. The reversal of 128782477950 is 59774287821.

It is a congruent 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, 61323940 + ... + 61326039.

It is an arithmetic number, because the mean of its divisors is an integer number (7604298760).

Almost surely, 2^128782477950 is an apocalyptic number.

128782477950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128782477950 is an abundant number, since it is smaller than the sum of its proper divisors (236223862530).

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

128782477950 is a wasteful number, since it uses less digits than its factorization.

128782477950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122650001 (or 122649996 counting only the distinct ones).

The product of its (nonzero) digits is 15805440, while the sum is 60.

The spelling of 128782477950 in words is "one hundred twenty-eight billion, seven hundred eighty-two million, four hundred seventy-seven thousand, nine hundred fifty".