195219664 has 10 divisors (see below), whose sum is σ = 378238130. Its totient is φ = 97609824.

The previous prime is 195219643. The next prime is 195219671. The reversal of 195219664 is 466912591.

It can be written as a sum of positive squares in only one way, i.e., 163635264 + 31584400 = 12792^2 + 5620^2 .

It is a super-2 number, since 2×195219664² = 76221434424545792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 195219664.

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, 6100599 + ... + 6100630.

It is an arithmetic number, because the mean of its divisors is an integer number (37823813).

Almost surely, 2^195219664 is an apocalyptic number.

It is an amenable number.

195219664 is a deficient number, since it is larger than the sum of its proper divisors (183018466).

195219664 is a wasteful number, since it uses less digits than its factorization.

195219664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12201237 (or 12201231 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The square root of 195219664 is about 13972.1030628893. The cubic root of 195219664 is about 580.1066629041.

The spelling of 195219664 in words is "one hundred ninety-five million, two hundred nineteen thousand, six hundred sixty-four".