128395388752 has 20 divisors (see below), whose sum is σ = 248794490196. Its totient is φ = 64190359040.

The previous prime is 128395388689. The next prime is 128395388767. The reversal of 128395388752 is 257883593821.

It can be written as a sum of positive squares in 2 ways, for example, as 123077478976 + 5317909776 = 350824^2 + 72924^2 .

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, 312649 + ... + 595432.

Almost surely, 2^128395388752 is an apocalyptic number.

It is an amenable number.

128395388752 is a deficient number, since it is larger than the sum of its proper divisors (120399101444).

128395388752 is an equidigital number, since it uses as much as digits as its factorization.

128395388752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916926 (or 916920 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 61.

The spelling of 128395388752 in words is "one hundred twenty-eight billion, three hundred ninety-five million, three hundred eighty-eight thousand, seven hundred fifty-two".