128164527394 has 8 divisors (see below), whose sum is σ = 192271882140. Its totient is φ = 64073900016.

The previous prime is 128164527391. The next prime is 128164527461. The reversal of 128164527394 is 493725461821.

It can be written as a sum of positive squares in 2 ways, for example, as 114890492025 + 13274035369 = 338955^2 + 115213^2 .

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

It is a super-2 number, since 2×128164527394² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128164527391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4162669 + ... + 4193344.

Almost surely, 2^128164527394 is an apocalyptic number.

128164527394 is a deficient number, since it is larger than the sum of its proper divisors (64107354746).

128164527394 is an equidigital number, since it uses as much as digits as its factorization.

128164527394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8363684.

The product of its digits is 2903040, while the sum is 52.

The spelling of 128164527394 in words is "one hundred twenty-eight billion, one hundred sixty-four million, five hundred twenty-seven thousand, three hundred ninety-four".