204516324605551 has 16 divisors (see below), whose sum is σ = 236178469823296. Its totient is φ = 173466110877696.

The previous prime is 204516324605543. The next prime is 204516324605639. The reversal of 204516324605551 is 155506423615402.

It is not a de Polignac number, because 204516324605551 - 2³ = 204516324605543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204516324605495 and 204516324605504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204516324605521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18432366 + ... + 27363931.

It is an arithmetic number, because the mean of its divisors is an integer number (14761154363956).

Almost surely, 2^{204516324605551} is an apocalyptic number.

204516324605551 is a deficient number, since it is larger than the sum of its proper divisors (31662145217745).

204516324605551 is an equidigital number, since it uses as much as digits as its factorization.

204516324605551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45802978.

The product of its (nonzero) digits is 4320000, while the sum is 49.

The spelling of 204516324605551 in words is "two hundred four trillion, five hundred sixteen billion, three hundred twenty-four million, six hundred five thousand, five hundred fifty-one".