204545454545405 has 8 divisors (see below), whose sum is σ = 245471677846272. Its totient is φ = 163624942041808.

The previous prime is 204545454545359. The next prime is 204545454545423. The reversal of 204545454545405 is 504545454545402.

204545454545405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204545454545405 - 2²⁶ = 204545387436541 is a prime.

It is a super-2 number, since 2×204545454545405² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1427620517 + ... + 1427763786.

It is an arithmetic number, because the mean of its divisors is an integer number (30683959730784).

Almost surely, 2^{204545454545405} is an apocalyptic number.

It is an amenable number.

204545454545405 is a deficient number, since it is larger than the sum of its proper divisors (40926223300867).

204545454545405 is a wasteful number, since it uses less digits than its factorization.

204545454545405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855398635.

The product of its (nonzero) digits is 128000000, while the sum is 56.

The spelling of 204545454545405 in words is "two hundred four trillion, five hundred forty-five billion, four hundred fifty-four million, five hundred forty-five thousand, four hundred five".