195181938436 has 9 divisors (see below), whose sum is σ = 341569938549. Its totient is φ = 97590527424.

The previous prime is 195181938433. The next prime is 195181938437. The reversal of 195181938436 is 634839181591.

The square root of 195181938436 is 441794.

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

It can be written as a sum of positive squares in only one way, i.e., 21912880900 + 173269057536 = 148030^2 + 416256^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195181938433) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 773140 + ... + 994036.

Almost surely, 2^195181938436 is an apocalyptic number.

195181938436 is the 441794-th square number.

It is an amenable number.

195181938436 is a deficient number, since it is larger than the sum of its proper divisors (146388000113).

195181938436 is an frugal number, since it uses more digits than its factorization.

195181938436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441798 (or 220899 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 58.

The spelling of 195181938436 in words is "one hundred ninety-five billion, one hundred eighty-one million, nine hundred thirty-eight thousand, four hundred thirty-six".