204557217983 has 8 divisors (see below), whose sum is σ = 212963681808. Its totient is φ = 196302222144.

The previous prime is 204557217961. The next prime is 204557217989. The reversal of 204557217983 is 389712755402.

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 204557217983 - 2¹⁰ = 204557216959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204557217989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37864241 + ... + 37869642.

It is an arithmetic number, because the mean of its divisors is an integer number (26620460226).

Almost surely, 2^204557217983 is an apocalyptic number.

204557217983 is a deficient number, since it is larger than the sum of its proper divisors (8406463825).

204557217983 is an equidigital number, since it uses as much as digits as its factorization.

204557217983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75733993.

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 204557217983 in words is "two hundred four billion, five hundred fifty-seven million, two hundred seventeen thousand, nine hundred eighty-three".