128517957385 has 8 divisors (see below), whose sum is σ = 154234555200. Its totient is φ = 102805695024.

The previous prime is 128517957349. The next prime is 128517957409. The reversal of 128517957385 is 583759715821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128517957385 - 2¹⁷ = 128517826313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1018285 + ... + 1137514.

It is an arithmetic number, because the mean of its divisors is an integer number (19279319400).

Almost surely, 2^128517957385 is an apocalyptic number.

It is an amenable number.

128517957385 is a deficient number, since it is larger than the sum of its proper divisors (25716597815).

128517957385 is a wasteful number, since it uses less digits than its factorization.

128517957385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167727.

The product of its digits is 21168000, while the sum is 61.

The spelling of 128517957385 in words is "one hundred twenty-eight billion, five hundred seventeen million, nine hundred fifty-seven thousand, three hundred eighty-five".