205045454520 has 96 divisors (see below), whose sum is σ = 667569567600. Its totient is φ = 54582637056.

The previous prime is 205045454483. The next prime is 205045454563. The reversal of 205045454520 is 25454540502.

205045454520 is a `hidden beast` number, since 2 + 0 + 50 + 4 + 545 + 45 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 295662 + ... + 705341.

Almost surely, 2^205045454520 is an apocalyptic number.

205045454520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205045454520 is an abundant number, since it is smaller than the sum of its proper divisors (462524113080).

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

205045454520 is a wasteful number, since it uses less digits than its factorization.

205045454520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001589 (or 1001582 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 36.

The spelling of 205045454520 in words is "two hundred five billion, forty-five million, four hundred fifty-four thousand, five hundred twenty".