197638427166 has 16 divisors (see below), whose sum is σ = 395281298064. Its totient is φ = 65878735104.

The previous prime is 197638427141. The next prime is 197638427201. The reversal of 197638427166 is 661724836791.

It is a super-4 number, since 4×197638427166⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780180 + ... + 1001976.

It is an arithmetic number, because the mean of its divisors is an integer number (24705081129).

Almost surely, 2^197638427166 is an apocalyptic number.

197638427166 is an abundant number, since it is smaller than the sum of its proper divisors (197642870898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197638427166 is a wasteful number, since it uses less digits than its factorization.

197638427166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370315.

The product of its digits is 18289152, while the sum is 60.

The spelling of 197638427166 in words is "one hundred ninety-seven billion, six hundred thirty-eight million, four hundred twenty-seven thousand, one hundred sixty-six".