128633425449993 has 12 divisors (see below), whose sum is σ = 185806167422148. Its totient is φ = 85754541276960.

The previous prime is 128633425449967. The next prime is 128633425450021. The reversal of 128633425449993 is 399944524336821.

128633425449993 is a `hidden beast` number, since 1 + 2 + 8 + 6 + 3 + 3 + 42 + 5 + 4 + 499 + 93 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 67150764426249 + 61482661023744 = 8194557^2 + 7841088^2 .

It is not a de Polignac number, because 128633425449993 - 2⁵ = 128633425449961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128633425449943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88883118 + ... + 90318743.

It is an arithmetic number, because the mean of its divisors is an integer number (15483847285179).

Almost surely, 2^{128633425449993} is an apocalyptic number.

It is an amenable number.

128633425449993 is a deficient number, since it is larger than the sum of its proper divisors (57172741972155).

128633425449993 is a wasteful number, since it uses less digits than its factorization.

128633425449993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179281624 (or 179281621 counting only the distinct ones).

The product of its digits is 1209323520, while the sum is 72.

The spelling of 128633425449993 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-three".