204986116117 has 2 divisors, whose sum is σ = 204986116118. Its totient is φ = 204986116116.

The previous prime is 204986116099. The next prime is 204986116147. The reversal of 204986116117 is 711611689402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181395920836 + 23590195281 = 425906^2 + 153591^2 .

It is a cyclic number.

It is not a de Polignac number, because 204986116117 - 2¹⁵ = 204986083349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204986116147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102493058058 + 102493058059.

It is an arithmetic number, because the mean of its divisors is an integer number (102493058059).

Almost surely, 2^204986116117 is an apocalyptic number.

It is an amenable number.

204986116117 is a deficient number, since it is larger than the sum of its proper divisors (1).

204986116117 is an equidigital number, since it uses as much as digits as its factorization.

204986116117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 204986116117 in words is "two hundred four billion, nine hundred eighty-six million, one hundred sixteen thousand, one hundred seventeen".