128840711063 has 4 divisors (see below), whose sum is σ = 128841599400. Its totient is φ = 128839822728.

The previous prime is 128840711059. The next prime is 128840711119. The reversal of 128840711063 is 360117048821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 128840711063 - 2² = 128840711059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128840711063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128840711053) 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, 170345 + ... + 535442.

It is an arithmetic number, because the mean of its divisors is an integer number (32210399850).

Almost surely, 2^128840711063 is an apocalyptic number.

128840711063 is a deficient number, since it is larger than the sum of its proper divisors (888337).

128840711063 is an equidigital number, since it uses as much as digits as its factorization.

128840711063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888336.

The product of its (nonzero) digits is 64512, while the sum is 41.

Adding to 128840711063 its reverse (360117048821), we get a palindrome (488957759884).

The spelling of 128840711063 in words is "one hundred twenty-eight billion, eight hundred forty million, seven hundred eleven thousand, sixty-three".