11640345583 has 4 divisors (see below), whose sum is σ = 12041736840. Its totient is φ = 11238954328.

The previous prime is 11640345551. The next prime is 11640345593. The reversal of 11640345583 is 38554304611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11640345583 - 2⁵ = 11640345551 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11640345593) 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, 200695585 + ... + 200695642.

It is an arithmetic number, because the mean of its divisors is an integer number (3010434210).

Almost surely, 2^11640345583 is an apocalyptic number.

11640345583 is a deficient number, since it is larger than the sum of its proper divisors (401391257).

11640345583 is an equidigital number, since it uses as much as digits as its factorization.

11640345583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401391256.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 11640345583 in words is "eleven billion, six hundred forty million, three hundred forty-five thousand, five hundred eighty-three".