197147918679 has 16 divisors (see below), whose sum is σ = 267557230080. Its totient is φ = 129099041120.

The previous prime is 197147918657. The next prime is 197147918687. The reversal of 197147918679 is 976819741791.

It is a cyclic number.

It is not a de Polignac number, because 197147918679 - 2⁸ = 197147918423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197147918479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1663107 + ... + 1777700.

It is an arithmetic number, because the mean of its divisors is an integer number (16722326880).

Almost surely, 2^197147918679 is an apocalyptic number.

197147918679 is a deficient number, since it is larger than the sum of its proper divisors (70409311401).

197147918679 is a wasteful number, since it uses less digits than its factorization.

197147918679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441150.

The product of its digits is 48009024, while the sum is 69.

The spelling of 197147918679 in words is "one hundred ninety-seven billion, one hundred forty-seven million, nine hundred eighteen thousand, six hundred seventy-nine".