2091955616447 has 2 divisors, whose sum is σ = 2091955616448. Its totient is φ = 2091955616446.

The previous prime is 2091955616423. The next prime is 2091955616453. The reversal of 2091955616447 is 7446165591902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2091955616447 - 2¹⁰ = 2091955615423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2091955616407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045977808223 + 1045977808224.

It is an arithmetic number, because the mean of its divisors is an integer number (1045977808224).

Almost surely, 2^{2091955616447} is an apocalyptic number.

2091955616447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091955616447 is an equidigital number, since it uses as much as digits as its factorization.

2091955616447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The spelling of 2091955616447 in words is "two trillion, ninety-one billion, nine hundred fifty-five million, six hundred sixteen thousand, four hundred forty-seven".