128633413072 has 20 divisors (see below), whose sum is σ = 252027546660. Its totient is φ = 63594046208.

The previous prime is 128633413067. The next prime is 128633413199. The reversal of 128633413072 is 270314336821.

It can be written as a sum of positive squares in 2 ways, for example, as 9542163856 + 119091249216 = 97684^2 + 345096^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45164803 + ... + 45167650.

It is an arithmetic number, because the mean of its divisors is an integer number (12601377333).

Almost surely, 2^128633413072 is an apocalyptic number.

It is an amenable number.

128633413072 is a deficient number, since it is larger than the sum of its proper divisors (123394133588).

128633413072 is an equidigital number, since it uses as much as digits as its factorization.

128633413072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90332550 (or 90332544 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

Adding to 128633413072 its reverse (270314336821), we get a palindrome (398947749893).

The spelling of 128633413072 in words is "one hundred twenty-eight billion, six hundred thirty-three million, four hundred thirteen thousand, seventy-two".