204243436377 has 12 divisors (see below), whose sum is σ = 295050549924. Its totient is φ = 136147404960.

The previous prime is 204243436349. The next prime is 204243436459. The reversal of 204243436377 is 773634342402.

204243436377 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 4 + 3 + 4 + 3 + 637 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 66855342096 + 137388094281 = 258564^2 + 370659^2 .

It is not a de Polignac number, because 204243436377 - 2⁸ = 204243436121 is a prime.

It is a super-2 number, since 2×204243436377² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204243436877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1153278 + ... + 1318535.

It is an arithmetic number, because the mean of its divisors is an integer number (24587545827).

Almost surely, 2^204243436377 is an apocalyptic number.

It is an amenable number.

204243436377 is a deficient number, since it is larger than the sum of its proper divisors (90807113547).

204243436377 is a wasteful number, since it uses less digits than its factorization.

204243436377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481000 (or 2480997 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 45.

Adding to 204243436377 its reverse (773634342402), we get a palindrome (977877778779).

The spelling of 204243436377 in words is "two hundred four billion, two hundred forty-three million, four hundred thirty-six thousand, three hundred seventy-seven".