2047145921791 has 2 divisors, whose sum is σ = 2047145921792. Its totient is φ = 2047145921790.

The previous prime is 2047145921773. The next prime is 2047145921893. The reversal of 2047145921791 is 1971295417402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2047145921791 - 2⁵ = 2047145921759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2047145921701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1023572960895 + 1023572960896.

It is an arithmetic number, because the mean of its divisors is an integer number (1023572960896).

Almost surely, 2^{2047145921791} is an apocalyptic number.

2047145921791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2047145921791 is an equidigital number, since it uses as much as digits as its factorization.

2047145921791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 2047145921791 in words is "two trillion, forty-seven billion, one hundred forty-five million, nine hundred twenty-one thousand, seven hundred ninety-one".