128253862281007 has 4 divisors (see below), whose sum is σ = 128375892598216. Its totient is φ = 128131831963800.

The previous prime is 128253862280981. The next prime is 128253862281049. The reversal of 128253862281007 is 700182268352821.

It is a happy number.

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-128253862281007 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 (128253862285007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61015157028 + ... + 61015159129.

It is an arithmetic number, because the mean of its divisors is an integer number (32093973149554).

Almost surely, 2^{128253862281007} is an apocalyptic number.

128253862281007 is a deficient number, since it is larger than the sum of its proper divisors (122030317209).

128253862281007 is a wasteful number, since it uses less digits than its factorization.

128253862281007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122030317208.

The product of its (nonzero) digits is 5160960, while the sum is 55.

The spelling of 128253862281007 in words is "one hundred twenty-eight trillion, two hundred fifty-three billion, eight hundred sixty-two million, two hundred eighty-one thousand, seven".