205435434512445 has 16 divisors (see below), whose sum is σ = 328700838602880. Its totient is φ = 109564183945664.

The previous prime is 205435434512377. The next prime is 205435434512537. The reversal of 205435434512445 is 544215434534502.

It is a cyclic number.

It is not a de Polignac number, because 205435434512445 - 2¹³ = 205435434504253 is a prime.

It is a congruent number.

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, 85090290 + ... + 87471299.

It is an arithmetic number, because the mean of its divisors is an integer number (20543802412680).

Almost surely, 2^{205435434512445} is an apocalyptic number.

It is an amenable number.

205435434512445 is a deficient number, since it is larger than the sum of its proper divisors (123265404090435).

205435434512445 is a wasteful number, since it uses less digits than its factorization.

205435434512445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172640964.

The product of its (nonzero) digits is 23040000, while the sum is 51.

The spelling of 205435434512445 in words is "two hundred five trillion, four hundred thirty-five billion, four hundred thirty-four million, five hundred twelve thousand, four hundred forty-five".