197198772049 has 4 divisors (see below), whose sum is σ = 197269430080. Its totient is φ = 197128114020.

The previous prime is 197198772011. The next prime is 197198772059. The reversal of 197198772049 is 940277891791.

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 197198772049 - 2⁹ = 197198771537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197198772059) 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, 35324829 + ... + 35330410.

It is an arithmetic number, because the mean of its divisors is an integer number (49317357520).

Almost surely, 2^197198772049 is an apocalyptic number.

It is an amenable number.

197198772049 is a deficient number, since it is larger than the sum of its proper divisors (70658031).

197198772049 is an equidigital number, since it uses as much as digits as its factorization.

197198772049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70658030.

The product of its (nonzero) digits is 16003008, while the sum is 64.

The spelling of 197198772049 in words is "one hundred ninety-seven billion, one hundred ninety-eight million, seven hundred seventy-two thousand, forty-nine".