204120314555 has 16 divisors (see below), whose sum is σ = 256148633664. Its totient is φ = 155857553280.

The previous prime is 204120314551. The next prime is 204120314641. The reversal of 204120314555 is 555413021402.

It is not a de Polignac number, because 204120314555 - 2² = 204120314551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204120314551) 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, 1872104 + ... + 1978133.

It is an arithmetic number, because the mean of its divisors is an integer number (16009289604).

Almost surely, 2^204120314555 is an apocalyptic number.

204120314555 is a deficient number, since it is larger than the sum of its proper divisors (52028319109).

204120314555 is a wasteful number, since it uses less digits than its factorization.

204120314555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3850726.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 204120314555 its reverse (555413021402), we get a palindrome (759533335957).

The spelling of 204120314555 in words is "two hundred four billion, one hundred twenty million, three hundred fourteen thousand, five hundred fifty-five".