197448072768018 has 18 divisors (see below), whose sum is σ = 427804286832039. Its totient is φ = 65816004384012.

The previous prime is 197448072767999. The next prime is 197448072768019. The reversal of 197448072768018 is 810867270844791.

197448072768018 is a `hidden beast` number, since 1 + 9 + 7 + 4 + 480 + 72 + 7 + 68 + 0 + 18 = 666.

It can be written as a sum of positive squares in only one way, i.e., 98724036384009 + 98724036384009 = 9935997^2 + 9935997^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=9935997.

It is not an unprimeable number, because it can be changed into a prime (197448072768019) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 57959983 + ... + 61271981.

Almost surely, 2^{197448072768018} is an apocalyptic number.

197448072768018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

197448072768018 is an abundant number, since it is smaller than the sum of its proper divisors (230356214064021).

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

197448072768018 is an frugal number, since it uses more digits than its factorization.

197448072768018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6624006 (or 3312004 counting only the distinct ones).

The product of its (nonzero) digits is 303464448, while the sum is 72.

The spelling of 197448072768018 in words is "one hundred ninety-seven trillion, four hundred forty-eight billion, seventy-two million, seven hundred sixty-eight thousand, eighteen".