5205634566 has 64 divisors (see below), whose sum is σ = 12057776640. Its totient is φ = 1480732160.

The previous prime is 5205634561. The next prime is 5205634571. The reversal of 5205634566 is 6654365025.

It is an interprime number because it is at equal distance from previous prime (5205634561) and next prime (5205634571).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205634561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 430495 + ... + 442421.

It is an arithmetic number, because the mean of its divisors is an integer number (188402760).

Almost surely, 2^5205634566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5205634566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6028888320).

5205634566 is an abundant number, since it is smaller than the sum of its proper divisors (6852142074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5205634566 is a wasteful number, since it uses less digits than its factorization.

5205634566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12349.

The product of its (nonzero) digits is 648000, while the sum is 42.

The square root of 5205634566 is about 72150.0836174152. The cubic root of 5205634566 is about 1733.1037388286.

The spelling of 5205634566 in words is "five billion, two hundred five million, six hundred thirty-four thousand, five hundred sixty-six".