204531220641 has 64 divisors (see below), whose sum is σ = 339299352576. Its totient is φ = 107994163200.

The previous prime is 204531220631. The next prime is 204531220679. The reversal of 204531220641 is 146022135402.

It is not a de Polignac number, because 204531220641 - 2¹⁴ = 204531204257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204531220599 and 204531220608.

It is not an unprimeable number, because it can be changed into a prime (204531220631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 144325 + ... + 655661.

It is an arithmetic number, because the mean of its divisors is an integer number (5301552384).

Almost surely, 2^204531220641 is an apocalyptic number.

It is an amenable number.

204531220641 is a deficient number, since it is larger than the sum of its proper divisors (134768131935).

204531220641 is a wasteful number, since it uses less digits than its factorization.

204531220641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511422.

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 204531220641 in words is "two hundred four billion, five hundred thirty-one million, two hundred twenty thousand, six hundred forty-one".