195844306849 has 27 divisors (see below), whose sum is σ = 208422696657. Its totient is φ = 184009379400.

The previous prime is 195844306841. The next prime is 195844306859. The reversal of 195844306849 is 948603448591.

It is a happy number.

The square root of 195844306849 is 442543.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 195844306849 - 2³ = 195844306841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195844306841) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 722672584 + ... + 722672854.

Almost surely, 2^195844306849 is an apocalyptic number.

195844306849 is the 442543-rd square number.

195844306849 is the 221272-nd centered octagonal number.

It is an amenable number.

195844306849 is a deficient number, since it is larger than the sum of its proper divisors (12578389808).

195844306849 is an frugal number, since it uses more digits than its factorization.

195844306849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 61.

The spelling of 195844306849 in words is "one hundred ninety-five billion, eight hundred forty-four million, three hundred six thousand, eight hundred forty-nine".