197894317312 has 18 divisors (see below), whose sum is σ = 395015610458. Its totient is φ = 98947158528.

The previous prime is 197894317241. The next prime is 197894317337. The reversal of 197894317312 is 213713498791.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 168480695296 + 29413622016 = 410464^2 + 171504^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386512083 + ... + 386512594.

Almost surely, 2^197894317312 is an apocalyptic number.

It is an amenable number.

197894317312 is a deficient number, since it is larger than the sum of its proper divisors (197121293146).

197894317312 is an frugal number, since it uses more digits than its factorization.

197894317312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773024693 (or 773024679 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 55.

The spelling of 197894317312 in words is "one hundred ninety-seven billion, eight hundred ninety-four million, three hundred seventeen thousand, three hundred twelve".