204467728191553 has 4 divisors (see below), whose sum is σ = 204467794801600. Its totient is φ = 204467661581508.

The previous prime is 204467728191473. The next prime is 204467728191707. The reversal of 204467728191553 is 355191827764402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204467728191553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204467728191953) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 28466253 + ... + 34917946.

It is an arithmetic number, because the mean of its divisors is an integer number (51116948700400).

It is a 1-persistent number, because it is pandigital, but 2⋅204467728191553 = 408935456383106 is not.

Almost surely, 2^{204467728191553} is an apocalyptic number.

It is an amenable number.

204467728191553 is a deficient number, since it is larger than the sum of its proper divisors (66610047).

204467728191553 is an equidigital number, since it uses as much as digits as its factorization.

204467728191553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66610046.

The product of its (nonzero) digits is 101606400, while the sum is 64.

The spelling of 204467728191553 in words is "two hundred four trillion, four hundred sixty-seven billion, seven hundred twenty-eight million, one hundred ninety-one thousand, five hundred fifty-three".