195121564 has 48 divisors (see below), whose sum is σ = 404812800. Its totient is φ = 81302400.

The previous prime is 195121559. The next prime is 195121603. The reversal of 195121564 is 465121591.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22152 + ... + 29680.

It is an arithmetic number, because the mean of its divisors is an integer number (8433600).

Almost surely, 2^195121564 is an apocalyptic number.

It is an amenable number.

195121564 is an abundant number, since it is smaller than the sum of its proper divisors (209691236).

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

195121564 is a wasteful number, since it uses less digits than its factorization.

195121564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7594 (or 7592 counting only the distinct ones).

The product of its digits is 10800, while the sum is 34.

The square root of 195121564 is about 13968.5920550355. The cubic root of 195121564 is about 580.0094766585.

The spelling of 195121564 in words is "one hundred ninety-five million, one hundred twenty-one thousand, five hundred sixty-four".