128425705267 has 6 divisors (see below), whose sum is σ = 136424538428. Its totient is φ = 120871251744.

The previous prime is 128425705229. The next prime is 128425705273. The reversal of 128425705267 is 762507524821.

It is not a de Polignac number, because 128425705267 - 2²³ = 128417316659 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 128425705267.

It is not an unprimeable number, because it can be changed into a prime (128425705867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222189513 + ... + 222190090.

Almost surely, 2^128425705267 is an apocalyptic number.

128425705267 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

128425705267 is a deficient number, since it is larger than the sum of its proper divisors (7998833161).

128425705267 is an equidigital number, since it uses as much as digits as its factorization.

128425705267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444379637 (or 444379620 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 49.

The spelling of 128425705267 in words is "one hundred twenty-eight billion, four hundred twenty-five million, seven hundred five thousand, two hundred sixty-seven".