11643655 has 8 divisors (see below), whose sum is σ = 14141232. Its totient is φ = 9202368.

The previous prime is 11643629. The next prime is 11643659. The reversal of 11643655 is 55634611.

11643655 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11643655 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11643659) 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, 13614 + ... + 14443.

It is an arithmetic number, because the mean of its divisors is an integer number (1767654).

Almost surely, 2^11643655 is an apocalyptic number.

11643655 is a deficient number, since it is larger than the sum of its proper divisors (2497577).

11643655 is an equidigital number, since it uses as much as digits as its factorization.

11643655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28145.

The product of its digits is 10800, while the sum is 31.

The square root of 11643655 is about 3412.2800295404. The cubic root of 11643655 is about 226.6538547641.

The spelling of 11643655 in words is "eleven million, six hundred forty-three thousand, six hundred fifty-five".