195945219653 has 2 divisors, whose sum is σ = 195945219654. Its totient is φ = 195945219652.

The previous prime is 195945219641. The next prime is 195945219683. The reversal of 195945219653 is 356912549591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195945219649 + 4 = 442657^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 195945219653 - 2²⁸ = 195676784197 is a prime.

It is a super-4 number, since 4×195945219653⁴ (a number of 46 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 195945219592 and 195945219601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195945219683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97972609826 + 97972609827.

It is an arithmetic number, because the mean of its divisors is an integer number (97972609827).

Almost surely, 2^195945219653 is an apocalyptic number.

It is an amenable number.

195945219653 is a deficient number, since it is larger than the sum of its proper divisors (1).

195945219653 is an equidigital number, since it uses as much as digits as its factorization.

195945219653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13122000, while the sum is 59.

The spelling of 195945219653 in words is "one hundred ninety-five billion, nine hundred forty-five million, two hundred nineteen thousand, six hundred fifty-three".