205135404154144 has 12 divisors (see below), whose sum is σ = 403860326928534. Its totient is φ = 102567702077056.

The previous prime is 205135404154133. The next prime is 205135404154159. The reversal of 205135404154144 is 441451404531502.

205135404154144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 163543481481744 + 41591922672400 = 12788412^2 + 6449180^2 .

It is a super-2 number, since 2×205135404154144² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 205135404154144.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3205240689877 + ... + 3205240689940.

Almost surely, 2^{205135404154144} is an apocalyptic number.

It is an amenable number.

205135404154144 is a deficient number, since it is larger than the sum of its proper divisors (198724922774390).

205135404154144 is an equidigital number, since it uses as much as digits as its factorization.

205135404154144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410481379827 (or 6410481379819 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 43.

Adding to 205135404154144 its reverse (441451404531502), we get a palindrome (646586808685646).

The spelling of 205135404154144 in words is "two hundred five trillion, one hundred thirty-five billion, four hundred four million, one hundred fifty-four thousand, one hundred forty-four".