197185473045648 has 30 divisors (see below), whose sum is σ = 551845455815654. Its totient is φ = 65728491015168.

The previous prime is 197185473045629. The next prime is 197185473045653. The reversal of 197185473045648 is 846540374581791.

197185473045648 is a `hidden beast` number, since 1 + 9 + 7 + 1 + 8 + 54 + 7 + 3 + 0 + 4 + 564 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 98800657781904 + 98384815263744 = 9939852^2 + 9918912^2 .

It is a super-2 number, since 2×197185473045648² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 684671781265 + ... + 684671781552.

Almost surely, 2^{197185473045648} is an apocalyptic number.

197185473045648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

197185473045648 is an abundant number, since it is smaller than the sum of its proper divisors (354659982770006).

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

197185473045648 is a wasteful number, since it uses less digits than its factorization.

197185473045648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369343562831 (or 1369343562822 counting only the distinct ones).

The product of its (nonzero) digits is 812851200, while the sum is 72.

The spelling of 197185473045648 in words is "one hundred ninety-seven trillion, one hundred eighty-five billion, four hundred seventy-three million, forty-five thousand, six hundred forty-eight".