197881968241 has 4 divisors (see below), whose sum is σ = 197884483312. Its totient is φ = 197879453172.

The previous prime is 197881968233. The next prime is 197881968253. The reversal of 197881968241 is 142869188791.

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 197881968241 - 2³ = 197881968233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197881968041) 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, 1135575 + ... + 1298188.

It is an arithmetic number, because the mean of its divisors is an integer number (49471120828).

Almost surely, 2^197881968241 is an apocalyptic number.

It is an amenable number.

197881968241 is a deficient number, since it is larger than the sum of its proper divisors (2515071).

197881968241 is an equidigital number, since it uses as much as digits as its factorization.

197881968241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515070.

The product of its digits is 13934592, while the sum is 64.

The spelling of 197881968241 in words is "one hundred ninety-seven billion, eight hundred eighty-one million, nine hundred sixty-eight thousand, two hundred forty-one".