10618865 has 4 divisors (see below), whose sum is σ = 12742644. Its totient is φ = 8495088.

The previous prime is 10618859. The next prime is 10618871. The reversal of 10618865 is 56881601.

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

It is an interprime number because it is at equal distance from previous prime (10618859) and next prime (10618871).

It can be written as a sum of positive squares in 2 ways, for example, as 3500641 + 7118224 = 1871^2 + 2668^2 .

It is a cyclic number.

It is not a de Polignac number, because 10618865 - 2¹⁸ = 10356721 is a prime.

It is a super-2 number, since 2×10618865² = 225520587776450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061882 + ... + 1061891.

It is an arithmetic number, because the mean of its divisors is an integer number (3185661).

Almost surely, 2^10618865 is an apocalyptic number.

It is an amenable number.

10618865 is a deficient number, since it is larger than the sum of its proper divisors (2123779).

10618865 is an equidigital number, since it uses as much as digits as its factorization.

10618865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123778.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 10618865 is about 3258.6600006751. The cubic root of 10618865 is about 219.7991624416.

The spelling of 10618865 in words is "ten million, six hundred eighteen thousand, eight hundred sixty-five".