198532723669 has 4 divisors (see below), whose sum is σ = 226894541344. Its totient is φ = 170170905996.

The previous prime is 198532723667. The next prime is 198532723709. The reversal of 198532723669 is 966327235891.

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: 966327235891 = 25873 ⋅37348867.

It is not a de Polignac number, because 198532723669 - 2¹ = 198532723667 is a prime.

It is a super-2 number, since 2×198532723669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198532723667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14180908827 + ... + 14180908840.

It is an arithmetic number, because the mean of its divisors is an integer number (56723635336).

Almost surely, 2^198532723669 is an apocalyptic number.

It is an amenable number.

198532723669 is a deficient number, since it is larger than the sum of its proper divisors (28361817675).

198532723669 is an equidigital number, since it uses as much as digits as its factorization.

198532723669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28361817674.

The product of its digits is 29393280, while the sum is 61.

The spelling of 198532723669 in words is "one hundred ninety-eight billion, five hundred thirty-two million, seven hundred twenty-three thousand, six hundred sixty-nine".