5205551898 has 16 divisors (see below), whose sum is σ = 10542890880. Its totient is φ = 1713219456.

The previous prime is 5205551891. The next prime is 5205551927. The reversal of 5205551898 is 8981555025.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5205551891) 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, 5490615 + ... + 5491562.

It is an arithmetic number, because the mean of its divisors is an integer number (658930680).

Almost surely, 2^5205551898 is an apocalyptic number.

5205551898 is an abundant number, since it is smaller than the sum of its proper divisors (5337338982).

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

5205551898 is a wasteful number, since it uses less digits than its factorization.

5205551898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10982261.

The product of its (nonzero) digits is 720000, while the sum is 48.

The square root of 5205551898 is about 72149.5107259918. The cubic root of 5205551898 is about 1733.0945646043.

The spelling of 5205551898 in words is "five billion, two hundred five million, five hundred fifty-one thousand, eight hundred ninety-eight".