128590977520 has 40 divisors (see below), whose sum is σ = 303069571056. Its totient is φ = 50731780608.

The previous prime is 128590977509. The next prime is 128590977521. The reversal of 128590977520 is 25779095821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128590977521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11003662 + ... + 11015341.

Almost surely, 2^128590977520 is an apocalyptic number.

128590977520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128590977520 is an abundant number, since it is smaller than the sum of its proper divisors (174478593536).

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

128590977520 is a wasteful number, since it uses less digits than its factorization.

128590977520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22019089 (or 22019083 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 55.

The spelling of 128590977520 in words is "one hundred twenty-eight billion, five hundred ninety million, nine hundred seventy-seven thousand, five hundred twenty".