11640455 has 8 divisors (see below), whose sum is σ = 14450400. Its totient is φ = 8991136.

The previous prime is 11640403. The next prime is 11640457. The reversal of 11640455 is 55404611.

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

It is a cyclic number.

It is not a de Polignac number, because 11640455 - 2⁸ = 11640199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11640457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39995 + ... + 40284.

It is an arithmetic number, because the mean of its divisors is an integer number (1806300).

Almost surely, 2^11640455 is an apocalyptic number.

11640455 is a deficient number, since it is larger than the sum of its proper divisors (2809945).

11640455 is an equidigital number, since it uses as much as digits as its factorization.

11640455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80313.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 11640455 is about 3411.8111026257. The cubic root of 11640455 is about 226.6330892688.

The spelling of 11640455 in words is "eleven million, six hundred forty thousand, four hundred fifty-five".