5661258218 has 96 divisors (see below), whose sum is σ = 10968988800. Its totient is φ = 2188771200.

The previous prime is 5661258217. The next prime is 5661258233. The reversal of 5661258218 is 8128521665.

It is a super-2 number, since 2×5661258218² = 64099689221745071048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5661258217) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20004305 + ... + 20004587.

It is an arithmetic number, because the mean of its divisors is an integer number (114260300).

Almost surely, 2^5661258218 is an apocalyptic number.

5661258218 is a deficient number, since it is larger than the sum of its proper divisors (5307730582).

5661258218 is a wasteful number, since it uses less digits than its factorization.

5661258218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 544 counting only the distinct ones).

The product of its digits is 230400, while the sum is 44.

The square root of 5661258218 is about 75241.3331753233. Note that the first 3 decimals coincide. The cubic root of 5661258218 is about 1782.2597040588.

The spelling of 5661258218 in words is "five billion, six hundred sixty-one million, two hundred fifty-eight thousand, two hundred eighteen".