195788049837 has 4 divisors (see below), whose sum is σ = 261050733120. Its totient is φ = 130525366556.

The previous prime is 195788049829. The next prime is 195788049851. The reversal of 195788049837 is 738940887591.

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 195788049837 - 2³ = 195788049829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195788049137) 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, 32631341637 + ... + 32631341642.

It is an arithmetic number, because the mean of its divisors is an integer number (65262683280).

Almost surely, 2^195788049837 is an apocalyptic number.

It is an amenable number.

195788049837 is a deficient number, since it is larger than the sum of its proper divisors (65262683283).

195788049837 is an equidigital number, since it uses as much as digits as its factorization.

195788049837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65262683282.

The product of its (nonzero) digits is 121927680, while the sum is 69.

The spelling of 195788049837 in words is "one hundred ninety-five billion, seven hundred eighty-eight million, forty-nine thousand, eight hundred thirty-seven".