204433642666643 has 16 divisors (see below), whose sum is σ = 220332372697920. Its totient is φ = 188559641660544.

The previous prime is 204433642666613. The next prime is 204433642666663. The reversal of 204433642666643 is 346666246334402.

It is a cyclic number.

It is not a de Polignac number, because 204433642666643 - 2⁸ = 204433642666387 is a prime.

It is a super-2 number, since 2×204433642666643² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204433642666613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1505013053 + ... + 1505148881.

It is an arithmetic number, because the mean of its divisors is an integer number (13770773293620).

Almost surely, 2^{204433642666643} is an apocalyptic number.

204433642666643 is a deficient number, since it is larger than the sum of its proper divisors (15898730031277).

204433642666643 is a wasteful number, since it uses less digits than its factorization.

204433642666643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225998.

The product of its (nonzero) digits is 214990848, while the sum is 59.

The spelling of 204433642666643 in words is "two hundred four trillion, four hundred thirty-three billion, six hundred forty-two million, six hundred sixty-six thousand, six hundred forty-three".