204155521289747 has 2 divisors, whose sum is σ = 204155521289748. Its totient is φ = 204155521289746.

The previous prime is 204155521289729. The next prime is 204155521289789. The reversal of 204155521289747 is 747982125551402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204155521289747 - 2³² = 204151226322451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204155521289747.

It is not a weakly prime, because it can be changed into another prime (204155521289717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102077760644873 + 102077760644874.

It is an arithmetic number, because the mean of its divisors is an integer number (102077760644874).

Almost surely, 2^{204155521289747} is an apocalyptic number.

204155521289747 is a deficient number, since it is larger than the sum of its proper divisors (1).

204155521289747 is an equidigital number, since it uses as much as digits as its factorization.

204155521289747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448000, while the sum is 62.

The spelling of 204155521289747 in words is "two hundred four trillion, one hundred fifty-five billion, five hundred twenty-one million, two hundred eighty-nine thousand, seven hundred forty-seven".