197643664 has 10 divisors (see below), whose sum is σ = 382934630. Its totient is φ = 98821824.

The previous prime is 197643661. The next prime is 197643707. The reversal of 197643664 is 466346791.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 187909264 + 9734400 = 13708^2 + 3120^2 .

It is not an unprimeable number, because it can be changed into a prime (197643661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6176349 + ... + 6176380.

It is an arithmetic number, because the mean of its divisors is an integer number (38293463).

Almost surely, 2^197643664 is an apocalyptic number.

It is an amenable number.

197643664 is a deficient number, since it is larger than the sum of its proper divisors (185290966).

197643664 is a wasteful number, since it uses less digits than its factorization.

197643664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12352737 (or 12352731 counting only the distinct ones).

The product of its digits is 653184, while the sum is 46.

The square root of 197643664 is about 14058.5797291192. The cubic root of 197643664 is about 582.4978125628.

The spelling of 197643664 in words is "one hundred ninety-seven million, six hundred forty-three thousand, six hundred sixty-four".