10643816 has 16 divisors (see below), whose sum is σ = 20012100. Its totient is φ = 5307264.

The previous prime is 10643813. The next prime is 10643849. The reversal of 10643816 is 61834601.

It can be written as a sum of positive squares in 2 ways, for example, as 7236100 + 3407716 = 2690^2 + 1846^2 .

It is a super-2 number, since 2×10643816² = 226581638083712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10643813) 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, 1646 + ... + 4898.

Almost surely, 2^10643816 is an apocalyptic number.

It is an amenable number.

10643816 is a deficient number, since it is larger than the sum of its proper divisors (9368284).

10643816 is a wasteful number, since it uses less digits than its factorization.

10643816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668 (or 3664 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 10643816 is about 3262.4861685531. The cubic root of 10643816 is about 219.9711807980.

The spelling of 10643816 in words is "ten million, six hundred forty-three thousand, eight hundred sixteen".