204539653567 has 2 divisors, whose sum is σ = 204539653568. Its totient is φ = 204539653566.

The previous prime is 204539653469. The next prime is 204539653573. The reversal of 204539653567 is 765356935402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204539653567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204539653667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102269826783 + 102269826784.

It is an arithmetic number, because the mean of its divisors is an integer number (102269826784).

Almost surely, 2^204539653567 is an apocalyptic number.

204539653567 is a deficient number, since it is larger than the sum of its proper divisors (1).

204539653567 is an equidigital number, since it uses as much as digits as its factorization.

204539653567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412000, while the sum is 55.

The spelling of 204539653567 in words is "two hundred four billion, five hundred thirty-nine million, six hundred fifty-three thousand, five hundred sixty-seven".