5645818658 has 16 divisors (see below), whose sum is σ = 8762878080. Its totient is φ = 2724906576.

The previous prime is 5645818649. The next prime is 5645818691. The reversal of 5645818658 is 8568185465.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299591 + ... + 317877.

It is an arithmetic number, because the mean of its divisors is an integer number (547679880).

Almost surely, 2^5645818658 is an apocalyptic number.

5645818658 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

5645818658 is a deficient number, since it is larger than the sum of its proper divisors (3117059422).

5645818658 is a wasteful number, since it uses less digits than its factorization.

5645818658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23641.

The product of its digits is 9216000, while the sum is 56.

The square root of 5645818658 is about 75138.6628707219. The cubic root of 5645818658 is about 1780.6380175068.

The spelling of 5645818658 in words is "five billion, six hundred forty-five million, eight hundred eighteen thousand, six hundred fifty-eight".