204397456345 has 8 divisors (see below), whose sum is σ = 259705003464. Its totient is φ = 153899261184.

The previous prime is 204397456343. The next prime is 204397456381. The reversal of 204397456345 is 543654793402.

It can be written as a sum of positive squares in 4 ways, for example, as 35861754384 + 168535701961 = 189372^2 + 410531^2 .

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 204397456345 - 2¹ = 204397456343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204397456292 and 204397456301.

It is not an unprimeable number, because it can be changed into a prime (204397456343) 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, 1202337894 + ... + 1202338063.

It is an arithmetic number, because the mean of its divisors is an integer number (32463125433).

Almost surely, 2^204397456345 is an apocalyptic number.

It is an amenable number.

204397456345 is a deficient number, since it is larger than the sum of its proper divisors (55307547119).

204397456345 is a wasteful number, since it uses less digits than its factorization.

204397456345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404675979.

The product of its (nonzero) digits is 10886400, while the sum is 52.

The spelling of 204397456345 in words is "two hundred four billion, three hundred ninety-seven million, four hundred fifty-six thousand, three hundred forty-five".