195725434249 has 4 divisors (see below), whose sum is σ = 196124060880. Its totient is φ = 195326807620.

The previous prime is 195725434241. The next prime is 195725434273. The reversal of 195725434249 is 942434527591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 195725434249 - 2³ = 195725434241 is a prime.

It is a super-2 number, since 2×195725434249² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195725434249.

It is not an unprimeable number, because it can be changed into a prime (195725434241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199312579 + ... + 199313560.

It is an arithmetic number, because the mean of its divisors is an integer number (49031015220).

Almost surely, 2^195725434249 is an apocalyptic number.

It is an amenable number.

195725434249 is a deficient number, since it is larger than the sum of its proper divisors (398626631).

195725434249 is an equidigital number, since it uses as much as digits as its factorization.

195725434249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398626630.

The product of its digits is 10886400, while the sum is 55.

The spelling of 195725434249 in words is "one hundred ninety-five billion, seven hundred twenty-five million, four hundred thirty-four thousand, two hundred forty-nine".