205321351136445 has 16 divisors (see below), whose sum is σ = 365015735353920. Its totient is φ = 109504720606032.

The previous prime is 205321351136333. The next prime is 205321351136453. The reversal of 205321351136445 is 544631153123502.

205321351136445 is a `hidden beast` number, since 2 + 0 + 5 + 3 + 21 + 3 + 51 + 136 + 445 = 666.

It is not a de Polignac number, because 205321351136445 - 2³⁷ = 205183912182973 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 205321351136445.

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, 760449448519 + ... + 760449448788.

It is an arithmetic number, because the mean of its divisors is an integer number (22813483459620).

Almost surely, 2^{205321351136445} is an apocalyptic number.

It is an amenable number.

205321351136445 is a deficient number, since it is larger than the sum of its proper divisors (159694384217475).

205321351136445 is a wasteful number, since it uses less digits than its factorization.

205321351136445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520898897321 (or 1520898897315 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 205321351136445 in words is "two hundred five trillion, three hundred twenty-one billion, three hundred fifty-one million, one hundred thirty-six thousand, four hundred forty-five".