128019336587 has 6 divisors (see below), whose sum is σ = 135992859588. Its totient is φ = 120488787104.

The previous prime is 128019336503. The next prime is 128019336619. The reversal of 128019336587 is 785633910821.

It is not a de Polignac number, because 128019336587 - 2¹² = 128019332491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128019332587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221486453 + ... + 221487030.

It is an arithmetic number, because the mean of its divisors is an integer number (22665476598).

Almost surely, 2^128019336587 is an apocalyptic number.

128019336587 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

128019336587 is a deficient number, since it is larger than the sum of its proper divisors (7973523001).

128019336587 is an equidigital number, since it uses as much as digits as its factorization.

128019336587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442973517 (or 442973500 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 128019336587 in words is "one hundred twenty-eight billion, nineteen million, three hundred thirty-six thousand, five hundred eighty-seven".