195505069505 has 8 divisors (see below), whose sum is σ = 235478226600. Its totient is φ = 155822626816.

The previous prime is 195505069447. The next prime is 195505069523. The reversal of 195505069505 is 505960505591.

It can be written as a sum of positive squares in 4 ways, for example, as 4371722161 + 191133347344 = 66119^2 + 437188^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195505069505 - 2¹² = 195505065409 is a prime.

It is a Curzon 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, 72677120 + ... + 72679809.

It is an arithmetic number, because the mean of its divisors is an integer number (29434778325).

Almost surely, 2^195505069505 is an apocalyptic number.

It is an amenable number.

195505069505 is a deficient number, since it is larger than the sum of its proper divisors (39973157095).

195505069505 is a wasteful number, since it uses less digits than its factorization.

195505069505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145357203.

The product of its (nonzero) digits is 1518750, while the sum is 50.

The spelling of 195505069505 in words is "one hundred ninety-five billion, five hundred five million, sixty-nine thousand, five hundred five".