204139036145 has 16 divisors (see below), whose sum is σ = 268002302400. Its totient is φ = 148039339200.

The previous prime is 204139036099. The next prime is 204139036147. The reversal of 204139036145 is 541630931402.

It is a de Polignac number, because none of the positive numbers 2^k-204139036145 is a prime.

It is a super-2 number, since 2×204139036145² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204139036099 and 204139036108.

It is not an unprimeable number, because it can be changed into a prime (204139036147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5298311 + ... + 5336700.

It is an arithmetic number, because the mean of its divisors is an integer number (16750143900).

Almost surely, 2^204139036145 is an apocalyptic number.

It is an amenable number.

204139036145 is a deficient number, since it is larger than the sum of its proper divisors (63863266255).

204139036145 is a wasteful number, since it uses less digits than its factorization.

204139036145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10635376.

The product of its (nonzero) digits is 77760, while the sum is 38.

Adding to 204139036145 its reverse (541630931402), we get a palindrome (745769967547).

The spelling of 204139036145 in words is "two hundred four billion, one hundred thirty-nine million, thirty-six thousand, one hundred forty-five".