204254642257 has 8 divisors (see below), whose sum is σ = 205023329280. Its totient is φ = 203486065920.

The previous prime is 204254642219. The next prime is 204254642261. The reversal of 204254642257 is 752246452402.

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 204254642257 - 2⁷ = 204254642129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204254642057) 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, 6871008 + ... + 6900670.

It is an arithmetic number, because the mean of its divisors is an integer number (25627916160).

Almost surely, 2^204254642257 is an apocalyptic number.

It is an amenable number.

204254642257 is a deficient number, since it is larger than the sum of its proper divisors (768687023).

204254642257 is a wasteful number, since it uses less digits than its factorization.

204254642257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55343.

The product of its (nonzero) digits is 1075200, while the sum is 43.

The spelling of 204254642257 in words is "two hundred four billion, two hundred fifty-four million, six hundred forty-two thousand, two hundred fifty-seven".