1995858224641 has 2 divisors, whose sum is σ = 1995858224642. Its totient is φ = 1995858224640.

The previous prime is 1995858224639. The next prime is 1995858224653. The reversal of 1995858224641 is 1464228585991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1848229374016 + 147628850625 = 1359496^2 + 384225^2 .

It is an emirp because it is prime and its reverse (1464228585991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1995858224641 - 2¹ = 1995858224639 is a prime.

Together with 1995858224639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1995858224611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997929112320 + 997929112321.

It is an arithmetic number, because the mean of its divisors is an integer number (997929112321).

Almost surely, 2^{1995858224641} is an apocalyptic number.

It is an amenable number.

1995858224641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1995858224641 is an equidigital number, since it uses as much as digits as its factorization.

1995858224641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49766400, while the sum is 64.

The spelling of 1995858224641 in words is "one trillion, nine hundred ninety-five billion, eight hundred fifty-eight million, two hundred twenty-four thousand, six hundred forty-one".