195721134336 has 432 divisors, whose sum is σ = 708749641600. Its totient is φ = 51616051200.

The previous prime is 195721134331. The next prime is 195721134359. The reversal of 195721134336 is 633431127591.

195721134336 is a `hidden beast` number, since 1 + 9 + 572 + 1 + 1 + 3 + 43 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 195721134291 and 195721134300.

It is not an unprimeable number, because it can be changed into a prime (195721134331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10264011 + ... + 10283061.

Almost surely, 2^195721134336 is an apocalyptic number.

195721134336 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 195721134336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354374820800).

195721134336 is an abundant number, since it is smaller than the sum of its proper divisors (513028507264).

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

195721134336 is a wasteful number, since it uses less digits than its factorization.

195721134336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19107 (or 19076 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The spelling of 195721134336 in words is "one hundred ninety-five billion, seven hundred twenty-one million, one hundred thirty-four thousand, three hundred thirty-six".