195891639216 has 480 divisors, whose sum is σ = 671886996480. Its totient is φ = 47799797760.

The previous prime is 195891639197. The next prime is 195891639221. The reversal of 195891639216 is 612936198591.

It is a self number, because there is not a number n which added to its sum of digits gives 195891639216.

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, 96544890 + ... + 96546918.

It is an arithmetic number, because the mean of its divisors is an integer number (1399764576).

Almost surely, 2^195891639216 is an apocalyptic number.

195891639216 is a gapful number since it is divisible by the number (16) 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 195891639216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335943498240).

195891639216 is an abundant number, since it is smaller than the sum of its proper divisors (475995357264).

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

195891639216 is a wasteful number, since it uses less digits than its factorization.

195891639216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145 (or 2108 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 60.

The spelling of 195891639216 in words is "one hundred ninety-five billion, eight hundred ninety-one million, six hundred thirty-nine thousand, two hundred sixteen".