204154521601 has 8 divisors (see below), whose sum is σ = 209681264000. Its totient is φ = 198628255728.

The previous prime is 204154521511. The next prime is 204154521647. The reversal of 204154521601 is 106125451402.

It is a happy number.

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 204154521601 - 2¹⁵ = 204154488833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204154521691) 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, 855850 + ... + 1068076.

It is an arithmetic number, because the mean of its divisors is an integer number (26210158000).

Almost surely, 2^204154521601 is an apocalyptic number.

It is an amenable number.

204154521601 is a deficient number, since it is larger than the sum of its proper divisors (5526742399).

204154521601 is a wasteful number, since it uses less digits than its factorization.

204154521601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238263.

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 204154521601 in words is "two hundred four billion, one hundred fifty-four million, five hundred twenty-one thousand, six hundred one".