128452433317 has 18 divisors (see below), whose sum is σ = 139788779858. Its totient is φ = 117336891648.

The previous prime is 128452433303. The next prime is 128452433323. The reversal of 128452433317 is 713334254821.

It can be written as a sum of positive squares in 3 ways, for example, as 24171231841 + 104281201476 = 155471^2 + 322926^2 .

It is not a de Polignac number, because 128452433317 - 2⁷ = 128452433189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128452433387) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 138269109 + ... + 138270037.

Almost surely, 2^128452433317 is an apocalyptic number.

It is an amenable number.

128452433317 is a deficient number, since it is larger than the sum of its proper divisors (11336346541).

128452433317 is an frugal number, since it uses more digits than its factorization.

128452433317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085 (or 1049 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The spelling of 128452433317 in words is "one hundred twenty-eight billion, four hundred fifty-two million, four hundred thirty-three thousand, three hundred seventeen".