11655520423 has 4 divisors (see below), whose sum is σ = 11655958840. Its totient is φ = 11655082008.

The previous prime is 11655520391. The next prime is 11655520439. The reversal of 11655520423 is 32402555611.

11655520423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11655520423 - 2⁵ = 11655520391 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 (11655520463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176565 + ... + 233422.

It is an arithmetic number, because the mean of its divisors is an integer number (2913989710).

Almost surely, 2^11655520423 is an apocalyptic number.

11655520423 is a deficient number, since it is larger than the sum of its proper divisors (438417).

11655520423 is an equidigital number, since it uses as much as digits as its factorization.

11655520423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438416.

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 11655520423 in words is "eleven billion, six hundred fifty-five million, five hundred twenty thousand, four hundred twenty-three".