188849663617 has 4 divisors (see below), whose sum is σ = 189516977200. Its totient is φ = 188182350036.

The previous prime is 188849663599. The next prime is 188849663633. The reversal of 188849663617 is 716366948881.

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, and also an emirpimes, since its reverse is a distinct semiprime: 716366948881 = 13183 ⋅54340207.

It is a cyclic number.

It is not a de Polignac number, because 188849663617 - 2³¹ = 186702179969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188849663657) 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, 333656367 + ... + 333656932.

It is an arithmetic number, because the mean of its divisors is an integer number (47379244300).

Almost surely, 2^188849663617 is an apocalyptic number.

It is an amenable number.

188849663617 is a deficient number, since it is larger than the sum of its proper divisors (667313583).

188849663617 is an equidigital number, since it uses as much as digits as its factorization.

188849663617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667313582.

The product of its digits is 83607552, while the sum is 67.

The spelling of 188849663617 in words is "one hundred eighty-eight billion, eight hundred forty-nine million, six hundred sixty-three thousand, six hundred seventeen".