204091615171 has 2 divisors, whose sum is σ = 204091615172. Its totient is φ = 204091615170.

The previous prime is 204091615127. The next prime is 204091615241. The reversal of 204091615171 is 171516190402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204091615171 - 2²⁷ = 203957397443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204091615171.

It is not a weakly prime, because it can be changed into another prime (204091615471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102045807585 + 102045807586.

It is an arithmetic number, because the mean of its divisors is an integer number (102045807586).

Almost surely, 2^204091615171 is an apocalyptic number.

204091615171 is a deficient number, since it is larger than the sum of its proper divisors (1).

204091615171 is an equidigital number, since it uses as much as digits as its factorization.

204091615171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 204091615171 in words is "two hundred four billion, ninety-one million, six hundred fifteen thousand, one hundred seventy-one".