204204511555554 has 32 divisors (see below), whose sum is σ = 424852383960000. Its totient is φ = 65353835833664.

The previous prime is 204204511555537. The next prime is 204204511555567. The reversal of 204204511555554 is 455555115402402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3278150829 + ... + 3278213120.

It is an arithmetic number, because the mean of its divisors is an integer number (13276636998750).

Almost surely, 2^{204204511555554} is an apocalyptic number.

204204511555554 is an abundant number, since it is smaller than the sum of its proper divisors (220647872404446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204204511555554 is a wasteful number, since it uses less digits than its factorization.

204204511555554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6556364162.

The product of its (nonzero) digits is 4000000, while the sum is 48.

Adding to 204204511555554 its reverse (455555115402402), we get a palindrome (659759626957956).

The spelling of 204204511555554 in words is "two hundred four trillion, two hundred four billion, five hundred eleven million, five hundred fifty-five thousand, five hundred fifty-four".