188970738529 has 4 divisors (see below), whose sum is σ = 188971616260. Its totient is φ = 188969860800.

The previous prime is 188970738427. The next prime is 188970738563. The reversal of 188970738529 is 925837079881.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 925837079881 = 7 ⋅132262439983.

It can be written as a sum of positive squares in 2 ways, for example, as 27264614400 + 161706124129 = 165120^2 + 402127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188970738529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188970738569) 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, 129037 + ... + 628165.

It is an arithmetic number, because the mean of its divisors is an integer number (47242904065).

Almost surely, 2^188970738529 is an apocalyptic number.

It is an amenable number.

188970738529 is a deficient number, since it is larger than the sum of its proper divisors (877731).

188970738529 is an equidigital number, since it uses as much as digits as its factorization.

188970738529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877730.

The product of its (nonzero) digits is 60963840, while the sum is 67.

The spelling of 188970738529 in words is "one hundred eighty-eight billion, nine hundred seventy million, seven hundred thirty-eight thousand, five hundred twenty-nine".