195919729993 has 8 divisors (see below), whose sum is σ = 211112957888. Its totient is φ = 180743999184.

The previous prime is 195919729991. The next prime is 195919730023. The reversal of 195919729993 is 399927919591.

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 195919729993 - 2¹ = 195919729991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195919729991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4351005 + ... + 4395802.

It is an arithmetic number, because the mean of its divisors is an integer number (26389119736).

Almost surely, 2^195919729993 is an apocalyptic number.

195919729993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

195919729993 is a deficient number, since it is larger than the sum of its proper divisors (15193227895).

195919729993 is a wasteful number, since it uses less digits than its factorization.

195919729993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8748543.

The product of its digits is 111602610, while the sum is 73.

The spelling of 195919729993 in words is "one hundred ninety-five billion, nine hundred nineteen million, seven hundred twenty-nine thousand, nine hundred ninety-three".