10640556 has 18 divisors (see below), whose sum is σ = 26897052. Its totient is φ = 3546840.

The previous prime is 10640543. The next prime is 10640569. The reversal of 10640556 is 65504601.

It is a happy number.

10640556 is a `hidden beast` number, since 10 + 640 + 5 + 5 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (10640543) and next prime (10640569).

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×10640556² = 226442863978272, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 147750 + ... + 147821.

Almost surely, 2^10640556 is an apocalyptic number.

It is an amenable number.

10640556 is an abundant number, since it is smaller than the sum of its proper divisors (16256496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10640556 is a wasteful number, since it uses less digits than its factorization.

10640556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295581 (or 295576 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 10640556 is about 3261.9865113148. The cubic root of 10640556 is about 219.9487208308.

The spelling of 10640556 in words is "ten million, six hundred forty thousand, five hundred fifty-six".