197249509841 has 4 divisors (see below), whose sum is σ = 199092963312. Its totient is φ = 195406056372.

The previous prime is 197249509837. The next prime is 197249509921. The reversal of 197249509841 is 148905942791.

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 197249509841 - 2² = 197249509837 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197249509801) 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, 921726575 + ... + 921726788.

It is an arithmetic number, because the mean of its divisors is an integer number (49773240828).

Almost surely, 2^197249509841 is an apocalyptic number.

It is an amenable number.

197249509841 is a deficient number, since it is larger than the sum of its proper divisors (1843453471).

197249509841 is a wasteful number, since it uses less digits than its factorization.

197249509841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843453470.

The product of its (nonzero) digits is 6531840, while the sum is 59.

The spelling of 197249509841 in words is "one hundred ninety-seven billion, two hundred forty-nine million, five hundred nine thousand, eight hundred forty-one".