204155132105535 has 64 divisors (see below), whose sum is σ = 373291080422400. Its totient is φ = 94507820909568.

The previous prime is 204155132105531. The next prime is 204155132105567. The reversal of 204155132105535 is 535501231551402.

It is not a de Polignac number, because 204155132105535 - 2² = 204155132105531 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204155132105531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 385494190 + ... + 386023419.

It is an arithmetic number, because the mean of its divisors is an integer number (5832673131600).

Almost surely, 2^{204155132105535} is an apocalyptic number.

204155132105535 is a deficient number, since it is larger than the sum of its proper divisors (169135948316865).

204155132105535 is a wasteful number, since it uses less digits than its factorization.

204155132105535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771517712.

The product of its (nonzero) digits is 450000, while the sum is 42.

Adding to 204155132105535 its reverse (535501231551402), we get a palindrome (739656363656937).

The spelling of 204155132105535 in words is "two hundred four trillion, one hundred fifty-five billion, one hundred thirty-two million, one hundred five thousand, five hundred thirty-five".