195649134720 has 512 divisors, whose sum is σ = 711568972800. Its totient is φ = 45327237120.

The previous prime is 195649134677. The next prime is 195649134721. The reversal of 195649134720 is 27431946591.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (195649134721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77299855 + ... + 77302385.

It is an arithmetic number, because the mean of its divisors is an integer number (1389783150).

Almost surely, 2^195649134720 is an apocalyptic number.

195649134720 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 195649134720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355784486400).

195649134720 is an abundant number, since it is smaller than the sum of its proper divisors (515919838080).

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

195649134720 is a wasteful number, since it uses less digits than its factorization.

195649134720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748 (or 2736 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 195649134720 in words is "one hundred ninety-five billion, six hundred forty-nine million, one hundred thirty-four thousand, seven hundred twenty".