205447320671 has 2 divisors, whose sum is σ = 205447320672. Its totient is φ = 205447320670.

The previous prime is 205447320667. The next prime is 205447320677. The reversal of 205447320671 is 176023744502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205447320671 - 2² = 205447320667 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205447320677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102723660335 + 102723660336.

It is an arithmetic number, because the mean of its divisors is an integer number (102723660336).

Almost surely, 2^205447320671 is an apocalyptic number.

205447320671 is a deficient number, since it is larger than the sum of its proper divisors (1).

205447320671 is an equidigital number, since it uses as much as digits as its factorization.

205447320671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 41.

The spelling of 205447320671 in words is "two hundred five billion, four hundred forty-seven million, three hundred twenty thousand, six hundred seventy-one".