197389655385 has 32 divisors (see below), whose sum is σ = 342795694080. Its totient is φ = 96411264768.

The previous prime is 197389655311. The next prime is 197389655401. The reversal of 197389655385 is 583556983791.

It is a happy number.

It is not a de Polignac number, because 197389655385 - 2¹³ = 197389647193 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 3960490 + ... + 4010019.

It is an arithmetic number, because the mean of its divisors is an integer number (10712365440).

Almost surely, 2^197389655385 is an apocalyptic number.

197389655385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197389655385 is a deficient number, since it is larger than the sum of its proper divisors (145406038695).

197389655385 is a wasteful number, since it uses less digits than its factorization.

197389655385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7970657.

The product of its digits is 244944000, while the sum is 69.

The spelling of 197389655385 in words is "one hundred ninety-seven billion, three hundred eighty-nine million, six hundred fifty-five thousand, three hundred eighty-five".