205115040126 has 20 divisors (see below), whose sum is σ = 459609627312. Its totient is φ = 68371679988.

The previous prime is 205115040059. The next prime is 205115040199. The reversal of 205115040126 is 621040511502.

205115040126 is a `hidden beast` number, since 20 + 5 + 11 + 504 + 0 + 126 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 205115040126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 633070950 + ... + 633071273.

Almost surely, 2^205115040126 is an apocalyptic number.

205115040126 is an abundant number, since it is smaller than the sum of its proper divisors (254494587186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205115040126 is a wasteful number, since it uses less digits than its factorization.

205115040126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266142237 (or 1266142228 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 205115040126 its reverse (621040511502), we get a palindrome (826155551628).

The spelling of 205115040126 in words is "two hundred five billion, one hundred fifteen million, forty thousand, one hundred twenty-six".