205415513144055 has 24 divisors (see below), whose sum is σ = 365676625203552. Its totient is φ = 106593996009024.

The previous prime is 205415513144041. The next prime is 205415513144099. The reversal of 205415513144055 is 550441315514502.

205415513144055 is a `hidden beast` number, since 2 + 0 + 5 + 4 + 1 + 551 + 3 + 1 + 4 + 40 + 55 = 666.

It is not a de Polignac number, because 205415513144055 - 2²¹ = 205415511046903 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 205415513144055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61686338619 + ... + 61686341948.

It is an arithmetic number, because the mean of its divisors is an integer number (15236526050148).

Almost surely, 2^{205415513144055} is an apocalyptic number.

205415513144055 is a deficient number, since it is larger than the sum of its proper divisors (160261112059497).

205415513144055 is a wasteful number, since it uses less digits than its factorization.

205415513144055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123372680615 (or 123372680612 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 45.

Adding to 205415513144055 its reverse (550441315514502), we get a palindrome (755856828658557).

The spelling of 205415513144055 in words is "two hundred five trillion, four hundred fifteen billion, five hundred thirteen million, one hundred forty-four thousand, fifty-five".