205475128004 has 6 divisors (see below), whose sum is σ = 359581474014. Its totient is φ = 102737564000.

The previous prime is 205475127983. The next prime is 205475128057. The reversal of 205475128004 is 400821574502.

It can be written as a sum of positive squares in only one way, i.e., 159528348100 + 45946779904 = 399410^2 + 214352^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25684390997 + ... + 25684391004.

It is an arithmetic number, because the mean of its divisors is an integer number (59930245669).

Almost surely, 2^205475128004 is an apocalyptic number.

It is an amenable number.

205475128004 is a deficient number, since it is larger than the sum of its proper divisors (154106346010).

205475128004 is a wasteful number, since it uses less digits than its factorization.

205475128004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51368782005 (or 51368782003 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 38.

The spelling of 205475128004 in words is "two hundred five billion, four hundred seventy-five million, one hundred twenty-eight thousand, four".