205375454161 has 2 divisors, whose sum is σ = 205375454162. Its totient is φ = 205375454160.

The previous prime is 205375454099. The next prime is 205375454231. The reversal of 205375454161 is 161454573502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201008755600 + 4366698561 = 448340^2 + 66081^2 .

It is a cyclic number.

It is not a de Polignac number, because 205375454161 - 2¹³ = 205375445969 is a prime.

It is not a weakly prime, because it can be changed into another prime (205375455161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102687727080 + 102687727081.

It is an arithmetic number, because the mean of its divisors is an integer number (102687727081).

Almost surely, 2^205375454161 is an apocalyptic number.

It is an amenable number.

205375454161 is a deficient number, since it is larger than the sum of its proper divisors (1).

205375454161 is an equidigital number, since it uses as much as digits as its factorization.

205375454161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 205375454161 in words is "two hundred five billion, three hundred seventy-five million, four hundred fifty-four thousand, one hundred sixty-one".