204012551664553 has 16 divisors (see below), whose sum is σ = 227385757379520. Its totient is φ = 181903250935296.

The previous prime is 204012551664547. The next prime is 204012551664577. The reversal of 204012551664553 is 355466155210402.

It is not a de Polignac number, because 204012551664553 - 2²¹ = 204012549567401 is a prime.

It is a super-2 number, since 2×204012551664553² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204012551664497 and 204012551664506.

It is not an unprimeable number, because it can be changed into a prime (204012551661553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17492901 + ... + 26721277.

It is an arithmetic number, because the mean of its divisors is an integer number (14211609836220).

Almost surely, 2^{204012551664553} is an apocalyptic number.

It is an amenable number.

204012551664553 is a deficient number, since it is larger than the sum of its proper divisors (23373205714967).

204012551664553 is a wasteful number, since it uses less digits than its factorization.

204012551664553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9296856.

The product of its (nonzero) digits is 4320000, while the sum is 49.

The spelling of 204012551664553 in words is "two hundred four trillion, twelve billion, five hundred fifty-one million, six hundred sixty-four thousand, five hundred fifty-three".