136166421641 has 4 divisors (see below), whose sum is σ = 136450694400. Its totient is φ = 135882148884.

The previous prime is 136166421607. The next prime is 136166421829. The reversal of 136166421641 is 146124661631.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-136166421641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136166421841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142135661 + ... + 142136618.

It is an arithmetic number, because the mean of its divisors is an integer number (34112673600).

Almost surely, 2^136166421641 is an apocalyptic number.

It is an amenable number.

136166421641 is a deficient number, since it is larger than the sum of its proper divisors (284272759).

136166421641 is an equidigital number, since it uses as much as digits as its factorization.

136166421641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284272758.

The product of its digits is 124416, while the sum is 41.

The spelling of 136166421641 in words is "one hundred thirty-six billion, one hundred sixty-six million, four hundred twenty-one thousand, six hundred forty-one".