128013448007 has 4 divisors (see below), whose sum is σ = 128029604976. Its totient is φ = 127997291040.

The previous prime is 128013447997. The next prime is 128013448009. The reversal of 128013448007 is 700844310821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128013448007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128013448009) 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, 8066594 + ... + 8082447.

It is an arithmetic number, because the mean of its divisors is an integer number (32007401244).

Almost surely, 2^128013448007 is an apocalyptic number.

128013448007 is a deficient number, since it is larger than the sum of its proper divisors (16156969).

128013448007 is an equidigital number, since it uses as much as digits as its factorization.

128013448007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16156968.

The product of its (nonzero) digits is 43008, while the sum is 38.

Adding to 128013448007 its reverse (700844310821), we get a palindrome (828857758828).

The spelling of 128013448007 in words is "one hundred twenty-eight billion, thirteen million, four hundred forty-eight thousand, seven".