197538171659 has 4 divisors (see below), whose sum is σ = 199384322904. Its totient is φ = 195692020416.

The previous prime is 197538171637. The next prime is 197538171673. The reversal of 197538171659 is 956171835791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 197538171659 - 2¹⁶ = 197538106123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197538171619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923075462 + ... + 923075675.

It is an arithmetic number, because the mean of its divisors is an integer number (49846080726).

Almost surely, 2^197538171659 is an apocalyptic number.

197538171659 is a deficient number, since it is larger than the sum of its proper divisors (1846151245).

197538171659 is a wasteful number, since it uses less digits than its factorization.

197538171659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846151244.

The product of its digits is 14288400, while the sum is 62.

The spelling of 197538171659 in words is "one hundred ninety-seven billion, five hundred thirty-eight million, one hundred seventy-one thousand, six hundred fifty-nine".