128769433185238 has 16 divisors (see below), whose sum is σ = 197270995207680. Its totient is φ = 63012534542056.

The previous prime is 128769433185227. The next prime is 128769433185299. The reversal of 128769433185238 is 832581334967821.

It is a super-2 number, since 2×128769433185238² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

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, 22343056 + ... + 27509107.

It is an arithmetic number, because the mean of its divisors is an integer number (12329437200480).

Almost surely, 2^{128769433185238} is an apocalyptic number.

128769433185238 is a deficient number, since it is larger than the sum of its proper divisors (68501562022442).

128769433185238 is a wasteful number, since it uses less digits than its factorization.

128769433185238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49879691.

The product of its digits is 418037760, while the sum is 70.

The spelling of 128769433185238 in words is "one hundred twenty-eight trillion, seven hundred sixty-nine billion, four hundred thirty-three million, one hundred eighty-five thousand, two hundred thirty-eight".