196868158661 has 4 divisors (see below), whose sum is σ = 196877102112. Its totient is φ = 196859215212.

The previous prime is 196868158651. The next prime is 196868158667. The reversal of 196868158661 is 166851868691.

196868158661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 196868158661 - 2¹⁴ = 196868142277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196868158667) 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, 4438625 + ... + 4482758.

It is an arithmetic number, because the mean of its divisors is an integer number (49219275528).

Almost surely, 2^196868158661 is an apocalyptic number.

It is an amenable number.

196868158661 is a deficient number, since it is larger than the sum of its proper divisors (8943451).

196868158661 is an equidigital number, since it uses as much as digits as its factorization.

196868158661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8943450.

The product of its digits is 29859840, while the sum is 65.

The spelling of 196868158661 in words is "one hundred ninety-six billion, eight hundred sixty-eight million, one hundred fifty-eight thousand, six hundred sixty-one".