1895330981965 has 4 divisors (see below), whose sum is σ = 2274397178364. Its totient is φ = 1516264785568.

The previous prime is 1895330981963. The next prime is 1895330981969. The reversal of 1895330981965 is 5691890335981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 380612495844 + 1514718486121 = 616938^2 + 1230739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1895330981965 - 2¹ = 1895330981963 is a prime.

It is a super-2 number, since 2×1895330981965² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1895330981965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1895330981963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189533098192 + ... + 189533098201.

It is an arithmetic number, because the mean of its divisors is an integer number (568599294591).

Almost surely, 2^{1895330981965} is an apocalyptic number.

It is an amenable number.

1895330981965 is a deficient number, since it is larger than the sum of its proper divisors (379066196399).

1895330981965 is an equidigital number, since it uses as much as digits as its factorization.

1895330981965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379066196398.

The product of its (nonzero) digits is 62985600, while the sum is 67.

The spelling of 1895330981965 in words is "one trillion, eight hundred ninety-five billion, three hundred thirty million, nine hundred eighty-one thousand, nine hundred sixty-five".