128112501263 has 4 divisors (see below), whose sum is σ = 128154688200. Its totient is φ = 128070314328.

The previous prime is 128112501241. The next prime is 128112501277. The reversal of 128112501263 is 362105211821.

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

It is a cyclic number.

It is not a de Polignac number, because 128112501263 - 2¹⁴ = 128112484879 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 (128112501203) 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, 21088913 + ... + 21094986.

It is an arithmetic number, because the mean of its divisors is an integer number (32038672050).

Almost surely, 2^128112501263 is an apocalyptic number.

128112501263 is a deficient number, since it is larger than the sum of its proper divisors (42186937).

128112501263 is an equidigital number, since it uses as much as digits as its factorization.

128112501263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42186936.

The product of its (nonzero) digits is 5760, while the sum is 32.

The spelling of 128112501263 in words is "one hundred twenty-eight billion, one hundred twelve million, five hundred one thousand, two hundred sixty-three".