195139230720 has 352 divisors, whose sum is σ = 727880448000. Its totient is φ = 44602048512.

The previous prime is 195139230719. The next prime is 195139230733. The reversal of 195139230720 is 27032931591.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5249961 + ... + 5286999.

Almost surely, 2^195139230720 is an apocalyptic number.

195139230720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195139230720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363940224000).

195139230720 is an abundant number, since it is smaller than the sum of its proper divisors (532741217280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195139230720 is an equidigital number, since it uses as much as digits as its factorization.

195139230720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37088 (or 37056 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 42.

The spelling of 195139230720 in words is "one hundred ninety-five billion, one hundred thirty-nine million, two hundred thirty thousand, seven hundred twenty".