128633425449992 has 32 divisors (see below), whose sum is σ = 247709829996120. Its totient is φ = 62577520911360.

The previous prime is 128633425449967. The next prime is 128633425450021. The reversal of 128633425449992 is 299944524336821.

It can be written as a sum of positive squares in 4 ways, for example, as 115635482519236 + 12997942930756 = 10753394^2 + 3605266^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17663888 + ... + 23859584.

Almost surely, 2^{128633425449992} is an apocalyptic number.

It is an amenable number.

128633425449992 is a deficient number, since it is larger than the sum of its proper divisors (119076404546128).

128633425449992 is a wasteful number, since it uses less digits than its factorization.

128633425449992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6265881 (or 6265877 counting only the distinct ones).

The product of its digits is 806215680, while the sum is 71.

The spelling of 128633425449992 in words is "one hundred twenty-eight trillion, six hundred thirty-three billion, four hundred twenty-five million, four hundred forty-nine thousand, nine hundred ninety-two".