197787225042 has 24 divisors (see below), whose sum is σ = 467497077840. Its totient is φ = 59935522680.

The previous prime is 197787224959. The next prime is 197787225079. The reversal of 197787225042 is 240522787791.

It is a self number, because there is not a number n which added to its sum of digits gives 197787225042.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 499462492 + ... + 499462887.

It is an arithmetic number, because the mean of its divisors is an integer number (19479044910).

Almost surely, 2^197787225042 is an apocalyptic number.

197787225042 is an abundant number, since it is smaller than the sum of its proper divisors (269709852798).

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

197787225042 is a wasteful number, since it uses less digits than its factorization.

197787225042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998925398 (or 998925395 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 54.

The spelling of 197787225042 in words is "one hundred ninety-seven billion, seven hundred eighty-seven million, two hundred twenty-five thousand, forty-two".