197638427167 has 4 divisors (see below), whose sum is σ = 197641730176. Its totient is φ = 197635124160.

The previous prime is 197638427141. The next prime is 197638427201. The reversal of 197638427167 is 761724836791.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197638427167 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 (197638427137) 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, 1560063 + ... + 1681984.

It is an arithmetic number, because the mean of its divisors is an integer number (49410432544).

Almost surely, 2^197638427167 is an apocalyptic number.

197638427167 is a deficient number, since it is larger than the sum of its proper divisors (3303009).

197638427167 is an equidigital number, since it uses as much as digits as its factorization.

197638427167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303008.

The product of its digits is 21337344, while the sum is 61.

The spelling of 197638427167 in words is "one hundred ninety-seven billion, six hundred thirty-eight million, four hundred twenty-seven thousand, one hundred sixty-seven".