128249202441 has 4 divisors (see below), whose sum is σ = 170998936592. Its totient is φ = 85499468292.

The previous prime is 128249202421. The next prime is 128249202479. The reversal of 128249202441 is 144202942821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 128249202441 - 2⁵ = 128249202409 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 128249202441.

It is not an unprimeable number, because it can be changed into a prime (128249202421) 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, 21374867071 + ... + 21374867076.

It is an arithmetic number, because the mean of its divisors is an integer number (42749734148).

Almost surely, 2^128249202441 is an apocalyptic number.

It is an amenable number.

128249202441 is a deficient number, since it is larger than the sum of its proper divisors (42749734151).

128249202441 is an equidigital number, since it uses as much as digits as its factorization.

128249202441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42749734150.

The product of its (nonzero) digits is 73728, while the sum is 39.

The spelling of 128249202441 in words is "one hundred twenty-eight billion, two hundred forty-nine million, two hundred two thousand, four hundred forty-one".