204637802897893 has 2 divisors, whose sum is σ = 204637802897894. Its totient is φ = 204637802897892.

The previous prime is 204637802897861. The next prime is 204637802897897. The reversal of 204637802897893 is 398798208736402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204637802897889 + 4 = 14305167^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 204637802897893 - 2⁵ = 204637802897861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204637802897897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102318901448946 + 102318901448947.

It is an arithmetic number, because the mean of its divisors is an integer number (102318901448947).

Almost surely, 2^{204637802897893} is an apocalyptic number.

It is an amenable number.

204637802897893 is a deficient number, since it is larger than the sum of its proper divisors (1).

204637802897893 is an equidigital number, since it uses as much as digits as its factorization.

204637802897893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1755758592, while the sum is 76.

The spelling of 204637802897893 in words is "two hundred four trillion, six hundred thirty-seven billion, eight hundred two million, eight hundred ninety-seven thousand, eight hundred ninety-three".