195721291116 has 288 divisors, whose sum is σ = 579774447616. Its totient is φ = 57316896000.

The previous prime is 195721291061. The next prime is 195721291169. The reversal of 195721291116 is 611192127591.

It is a super-2 number, since 2×195721291116² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23890581 + ... + 23898771.

Almost surely, 2^195721291116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195721291116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289887223808).

195721291116 is an abundant number, since it is smaller than the sum of its proper divisors (384053156500).

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

195721291116 is a wasteful number, since it uses less digits than its factorization.

195721291116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8315 (or 8301 counting only the distinct ones).

The product of its digits is 68040, while the sum is 45.

The spelling of 195721291116 in words is "one hundred ninety-five billion, seven hundred twenty-one million, two hundred ninety-one thousand, one hundred sixteen".