14408728655 has 4 divisors (see below), whose sum is σ = 17290474392. Its totient is φ = 11526982920.

The previous prime is 14408728651. The next prime is 14408728661. The reversal of 14408728655 is 55682780441.

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

It is not a de Polignac number, because 14408728655 - 2² = 14408728651 is a prime.

It is a super-2 number, since 2×14408728655² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14408728651) 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, 1440872861 + ... + 1440872870.

It is an arithmetic number, because the mean of its divisors is an integer number (4322618598).

Almost surely, 2^14408728655 is an apocalyptic number.

14408728655 is a deficient number, since it is larger than the sum of its proper divisors (2881745737).

14408728655 is an equidigital number, since it uses as much as digits as its factorization.

14408728655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881745736.

The product of its (nonzero) digits is 2150400, while the sum is 50.

The spelling of 14408728655 in words is "fourteen billion, four hundred eight million, seven hundred twenty-eight thousand, six hundred fifty-five".