2198494805 has 18 divisors (see below), whose sum is σ = 2858514534. Its totient is φ = 1622497344.

The previous prime is 2198494789. The next prime is 2198494811. The reversal of 2198494805 is 5084948912.

It can be written as a sum of positive squares in 9 ways, for example, as 973564804 + 1224930001 = 31202^2 + 34999^2 .

It is not a de Polignac number, because 2198494805 - 2⁴ = 2198494789 is a prime.

It is a super-2 number, since 2×2198494805² = 9666758815223976050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1362179 + ... + 1363791.

It is an arithmetic number, because the mean of its divisors is an integer number (158806363).

Almost surely, 2^2198494805 is an apocalyptic number.

It is an amenable number.

2198494805 is a deficient number, since it is larger than the sum of its proper divisors (660019729).

2198494805 is an frugal number, since it uses more digits than its factorization.

2198494805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 50.

The square root of 2198494805 is about 46888.1094201931. The cubic root of 2198494805 is about 1300.2947664919.

The spelling of 2198494805 in words is "two billion, one hundred ninety-eight million, four hundred ninety-four thousand, eight hundred five".