198622657537 has 4 divisors (see below), whose sum is σ = 207258425280. Its totient is φ = 189986889796.

The previous prime is 198622657487. The next prime is 198622657543. The reversal of 198622657537 is 735756226891.

It is a happy number.

198622657537 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 a de Polignac number, because none of the positive numbers 2^k-198622657537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198622651537) 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, 4317883837 + ... + 4317883882.

It is an arithmetic number, because the mean of its divisors is an integer number (51814606320).

Almost surely, 2^198622657537 is an apocalyptic number.

It is an amenable number.

198622657537 is a deficient number, since it is larger than the sum of its proper divisors (8635767743).

198622657537 is an equidigital number, since it uses as much as digits as its factorization.

198622657537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8635767742.

The product of its digits is 38102400, while the sum is 61.

The spelling of 198622657537 in words is "one hundred ninety-eight billion, six hundred twenty-two million, six hundred fifty-seven thousand, five hundred thirty-seven".