188729868641 has 4 divisors (see below), whose sum is σ = 191118854400. Its totient is φ = 186340882884.

The previous prime is 188729868611. The next prime is 188729868697. The reversal of 188729868641 is 146868927881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 188729868641 - 2¹⁴ = 188729852257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (188729868611) 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, 1194492761 + ... + 1194492918.

It is an arithmetic number, because the mean of its divisors is an integer number (47779713600).

Almost surely, 2^188729868641 is an apocalyptic number.

It is an amenable number.

188729868641 is a deficient number, since it is larger than the sum of its proper divisors (2388985759).

188729868641 is an equidigital number, since it uses as much as digits as its factorization.

188729868641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388985758.

The product of its digits is 74317824, while the sum is 68.

The spelling of 188729868641 in words is "one hundred eighty-eight billion, seven hundred twenty-nine million, eight hundred sixty-eight thousand, six hundred forty-one".