204545454545456 has 20 divisors (see below), whose sum is σ = 396307359835800. Its totient is φ = 102272587491072.

The previous prime is 204545454545423. The next prime is 204545454545461. The reversal of 204545454545456 is 654545454545402.

It is a super-2 number, since 2×204545454545456² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3888935 + ... + 20596473.

It is an arithmetic number, because the mean of its divisors is an integer number (19815367991790).

Almost surely, 2^{204545454545456} is an apocalyptic number.

It is an amenable number.

204545454545456 is a deficient number, since it is larger than the sum of its proper divisors (191761905290344).

204545454545456 is a wasteful number, since it uses less digits than its factorization.

204545454545456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17472716 (or 17472710 counting only the distinct ones).

The product of its (nonzero) digits is 768000000, while the sum is 62.

The spelling of 204545454545456 in words is "two hundred four trillion, five hundred forty-five billion, four hundred fifty-four million, five hundred forty-five thousand, four hundred fifty-six".