8201618 has 4 divisors (see below), whose sum is σ = 12302430. Its totient is φ = 4100808.

The previous prime is 8201603. The next prime is 8201621. The reversal of 8201618 is 8161028.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6165289 + 2036329 = 2483^2 + 1427^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2050403 + ... + 2050406.

Almost surely, 2^8201618 is an apocalyptic number.

8201618 is a deficient number, since it is larger than the sum of its proper divisors (4100812).

8201618 is a wasteful number, since it uses less digits than its factorization.

8201618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4100811.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 8201618 is about 2863.8467137750. The cubic root of 8201618 is about 201.6662298407. Note that the first 3 decimals are identical.

The spelling of 8201618 in words is "eight million, two hundred one thousand, six hundred eighteen".