128929999653564 has 12 divisors (see below), whose sum is σ = 300836665858344. Its totient is φ = 42976666551184.

The previous prime is 128929999653563. The next prime is 128929999653673. The reversal of 128929999653564 is 465356999929821.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128929999653563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5372083318887 + ... + 5372083318910.

It is an arithmetic number, because the mean of its divisors is an integer number (25069722154862).

Almost surely, 2^{128929999653564} is an apocalyptic number.

It is an amenable number.

128929999653564 is an abundant number, since it is smaller than the sum of its proper divisors (171906666204780).

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

128929999653564 is a wasteful number, since it uses less digits than its factorization.

128929999653564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10744166637804 (or 10744166637802 counting only the distinct ones).

The product of its digits is 20407334400, while the sum is 87.

The spelling of 128929999653564 in words is "one hundred twenty-eight trillion, nine hundred twenty-nine billion, nine hundred ninety-nine million, six hundred fifty-three thousand, five hundred sixty-four".