195924771219969 has 63 divisors (see below), whose sum is σ = 322892135820499. Its totient is φ = 118739766071520.

The previous prime is 195924771219941. The next prime is 195924771220027. The reversal of 195924771219969 is 969912177429591.

The square root of 195924771219969 is 13997313.

It is a perfect power (a square), and thus also a powerful number.

195924771219969 is a `hidden beast` number, since 1 + 9 + 5 + 9 + 247 + 71 + 219 + 96 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 74822490369 + 195849948729600 = 273537^2 + 13994640^2 .

It is not a de Polignac number, because 195924771219969 - 2²³ = 195924762831361 is a prime.

It is a super-2 number, since 2×195924771219969² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (195924771019969) by changing a digit.

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 62 ways as a sum of consecutive naturals, for example, 4157178397 + ... + 4157225525.

Almost surely, 2^{195924771219969} is an apocalyptic number.

195924771219969 is the 13997313-rd square number.

195924771219969 is the 6998657-th centered octagonal number.

It is an amenable number.

195924771219969 is a deficient number, since it is larger than the sum of its proper divisors (126967364600530).

195924771219969 is an frugal number, since it uses more digits than its factorization.

195924771219969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94298 (or 47143 counting only the distinct ones).

The product of its digits is 1388832480, while the sum is 81.

195924771219969 divided by its sum of digits (81) gives a square (2418824336049 = 1555257²).

The spelling of 195924771219969 in words is "one hundred ninety-five trillion, nine hundred twenty-four billion, seven hundred seventy-one million, two hundred nineteen thousand, nine hundred sixty-nine".