13455567779 has 4 divisors (see below), whose sum is σ = 14247071784. Its totient is φ = 12664063776.

The previous prime is 13455567767. The next prime is 13455567799. The reversal of 13455567779 is 97776555431.

It is a happy number.

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

It is not a de Polignac number, because 13455567779 - 2¹⁶ = 13455502243 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (13455567799) 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, 395751977 + ... + 395752010.

It is an arithmetic number, because the mean of its divisors is an integer number (3561767946).

Almost surely, 2^13455567779 is an apocalyptic number.

13455567779 is a deficient number, since it is larger than the sum of its proper divisors (791504005).

13455567779 is an equidigital number, since it uses as much as digits as its factorization.

13455567779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791504004.

The product of its digits is 27783000, while the sum is 59.

The spelling of 13455567779 in words is "thirteen billion, four hundred fifty-five million, five hundred sixty-seven thousand, seven hundred seventy-nine".