10643656 has 16 divisors (see below), whose sum is σ = 20018700. Its totient is φ = 5305344.

The previous prime is 10643653. The next prime is 10643657. The reversal of 10643656 is 65634601.

It can be written as a sum of positive squares in 2 ways, for example, as 10458756 + 184900 = 3234^2 + 430^2 .

It is a super-3 number, since 3×10643656³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (10643653) 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, 940 + ... + 4708.

Almost surely, 2^10643656 is an apocalyptic number.

It is an amenable number.

10643656 is a deficient number, since it is larger than the sum of its proper divisors (9375044).

10643656 is a wasteful number, since it uses less digits than its factorization.

10643656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4128 (or 4124 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 10643656 is about 3262.4616472841. The cubic root of 10643656 is about 219.9700785753.

The spelling of 10643656 in words is "ten million, six hundred forty-three thousand, six hundred fifty-six".