197876678791 has 8 divisors (see below), whose sum is σ = 215870486400. Its totient is φ = 179883707640.

The previous prime is 197876678743. The next prime is 197876678821.

197876678791 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 197876678791 - 2¹⁹ = 197876154503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197876678291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350700 + ... + 720238.

It is an arithmetic number, because the mean of its divisors is an integer number (26983810800).

Almost surely, 2^197876678791 is an apocalyptic number.

197876678791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

197876678791 is a deficient number, since it is larger than the sum of its proper divisors (17993807609).

197876678791 is a wasteful number, since it uses less digits than its factorization.

197876678791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418229.

The product of its digits is 448084224, while the sum is 76.

The spelling of 197876678791 in words is "one hundred ninety-seven billion, eight hundred seventy-six million, six hundred seventy-eight thousand, seven hundred ninety-one".