128139436325 has 12 divisors (see below), whose sum is σ = 158904929508. Its totient is φ = 102503788800.

The previous prime is 128139436319. The next prime is 128139436357. The reversal of 128139436325 is 523634931821.

It can be written as a sum of positive squares in 6 ways, for example, as 1937584324 + 126201852001 = 44018^2 + 355249^2 .

It is not a de Polignac number, because 128139436325 - 2⁴ = 128139436309 is a prime.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

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 128139436325.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155165 + ... + 529485.

It is an arithmetic number, because the mean of its divisors is an integer number (13242077459).

Almost surely, 2^128139436325 is an apocalyptic number.

It is an amenable number.

128139436325 is a deficient number, since it is larger than the sum of its proper divisors (30765493183).

128139436325 is a wasteful number, since it uses less digits than its factorization.

128139436325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388024 (or 388019 counting only the distinct ones).

The product of its digits is 933120, while the sum is 47.

The spelling of 128139436325 in words is "one hundred twenty-eight billion, one hundred thirty-nine million, four hundred thirty-six thousand, three hundred twenty-five".