195724308061 has 4 divisors (see below), whose sum is σ = 195725418300. Its totient is φ = 195723197824.

The previous prime is 195724308041. The next prime is 195724308083. The reversal of 195724308061 is 160803427591.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 160803427591 = 29 ⋅5544945779.

It can be written as a sum of positive squares in 2 ways, for example, as 652802500 + 195071505561 = 25550^2 + 441669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195724308061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195724308041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225406 + ... + 665023.

It is an arithmetic number, because the mean of its divisors is an integer number (48931354575).

It is a 1-persistent number, because it is pandigital, but 2⋅195724308061 = 391448616122 is not.

Almost surely, 2^195724308061 is an apocalyptic number.

It is an amenable number.

195724308061 is a deficient number, since it is larger than the sum of its proper divisors (1110239).

195724308061 is an equidigital number, since it uses as much as digits as its factorization.

195724308061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110238.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 195724308061 in words is "one hundred ninety-five billion, seven hundred twenty-four million, three hundred eight thousand, sixty-one".