205506553240426 has 32 divisors (see below), whose sum is σ = 316304464544640. Its totient is φ = 100085369900544.

The previous prime is 205506553240397. The next prime is 205506553240441. The reversal of 205506553240426 is 624042355605502.

It is a super-2 number, since 2×205506553240426² (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 205506553240426.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44674726 + ... + 49059598.

It is an arithmetic number, because the mean of its divisors is an integer number (9884514517020).

Almost surely, 2^{205506553240426} is an apocalyptic number.

205506553240426 is a deficient number, since it is larger than the sum of its proper divisors (110797911304214).

205506553240426 is a wasteful number, since it uses less digits than its factorization.

205506553240426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4386430.

The product of its (nonzero) digits is 8640000, while the sum is 49.

The spelling of 205506553240426 in words is "two hundred five trillion, five hundred six billion, five hundred fifty-three million, two hundred forty thousand, four hundred twenty-six".