1995581696993 has 2 divisors, whose sum is σ = 1995581696994. Its totient is φ = 1995581696992.

The previous prime is 1995581696963. The next prime is 1995581697013. The reversal of 1995581696993 is 3996961855991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1198011244369 + 797570452624 = 1094537^2 + 893068^2 .

It is a cyclic number.

It is not a de Polignac number, because 1995581696993 - 2²² = 1995577502689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1995581696963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997790848496 + 997790848497.

It is an arithmetic number, because the mean of its divisors is an integer number (997790848497).

Almost surely, 2^{1995581696993} is an apocalyptic number.

It is an amenable number.

1995581696993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1995581696993 is an equidigital number, since it uses as much as digits as its factorization.

1995581696993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1275458400, while the sum is 80.

The spelling of 1995581696993 in words is "one trillion, nine hundred ninety-five billion, five hundred eighty-one million, six hundred ninety-six thousand, nine hundred ninety-three".