197140644840 has 192 divisors, whose sum is σ = 648527823360. Its totient is φ = 47882096640.

The previous prime is 197140644817. The next prime is 197140644853. The reversal of 197140644840 is 48446041791.

It is a self number, because there is not a number n which added to its sum of digits gives 197140644840.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 983394 + ... + 1166766.

It is an arithmetic number, because the mean of its divisors is an integer number (3377749080).

Almost surely, 2^197140644840 is an apocalyptic number.

197140644840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197140644840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324263911680).

197140644840 is an abundant number, since it is smaller than the sum of its proper divisors (451387178520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197140644840 is a wasteful number, since it uses less digits than its factorization.

197140644840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183452 (or 183431 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 197140644840 in words is "one hundred ninety-seven billion, one hundred forty million, six hundred forty-four thousand, eight hundred forty".