11681656 has 32 divisors (see below), whose sum is σ = 26352000. Its totient is φ = 4742496.

The previous prime is 11681653. The next prime is 11681689. The reversal of 11681656 is 65618611.

It is a super-2 number, since 2×11681656² = 272922173804672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11681653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4426 + ... + 6553.

It is an arithmetic number, because the mean of its divisors is an integer number (823500).

Almost surely, 2^11681656 is an apocalyptic number.

It is an amenable number.

11681656 is an abundant number, since it is smaller than the sum of its proper divisors (14670344).

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

11681656 is a wasteful number, since it uses less digits than its factorization.

11681656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11011 (or 11007 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 11681656 is about 3417.8437647148. The cubic root of 11681656 is about 226.9001611580.

The spelling of 11681656 in words is "eleven million, six hundred eighty-one thousand, six hundred fifty-six".