128762787500 has 36 divisors (see below), whose sum is σ = 281650598208. Its totient is φ = 51505110000.

The previous prime is 128762787499. The next prime is 128762787539. The reversal of 128762787500 is 5787267821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5138012 + ... + 5163011.

It is an arithmetic number, because the mean of its divisors is an integer number (7823627728).

Almost surely, 2^128762787500 is an apocalyptic number.

128762787500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128762787500 is an abundant number, since it is smaller than the sum of its proper divisors (152887810708).

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

128762787500 is an equidigital number, since it uses as much as digits as its factorization.

128762787500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10301052 (or 10301030 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 53.

The spelling of 128762787500 in words is "one hundred twenty-eight billion, seven hundred sixty-two million, seven hundred eighty-seven thousand, five hundred".