205170517004 has 6 divisors (see below), whose sum is σ = 359048404764. Its totient is φ = 102585258500.

The previous prime is 205170516949. The next prime is 205170517007. The reversal of 205170517004 is 400715071502.

It is not an unprimeable number, because it can be changed into a prime (205170517007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25646314622 + ... + 25646314629.

It is an arithmetic number, because the mean of its divisors is an integer number (59841400794).

Almost surely, 2^205170517004 is an apocalyptic number.

It is an amenable number.

205170517004 is a deficient number, since it is larger than the sum of its proper divisors (153877887760).

205170517004 is a wasteful number, since it uses less digits than its factorization.

205170517004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51292629255 (or 51292629253 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 32.

Adding to 205170517004 its reverse (400715071502), we get a palindrome (605885588506).

The spelling of 205170517004 in words is "two hundred five billion, one hundred seventy million, five hundred seventeen thousand, four".