10818649 has 4 divisors (see below), whose sum is σ = 10873764. Its totient is φ = 10763536.

The previous prime is 10818641. The next prime is 10818683. The reversal of 10818649 is 94681801.

It is a happy number.

10818649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7952400 + 2866249 = 2820^2 + 1693^2 .

It is a cyclic number.

It is not a de Polignac number, because 10818649 - 2³ = 10818641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10818641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27262 + ... + 27655.

It is an arithmetic number, because the mean of its divisors is an integer number (2718441).

Almost surely, 2^10818649 is an apocalyptic number.

It is an amenable number.

10818649 is a deficient number, since it is larger than the sum of its proper divisors (55115).

10818649 is an equidigital number, since it uses as much as digits as its factorization.

10818649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55114.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 10818649 is about 3289.1714762232. The cubic root of 10818649 is about 221.1690454675.

It can be divided in two parts, 1081 and 8649, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 10818649 in words is "ten million, eight hundred eighteen thousand, six hundred forty-nine".