13444677779 has 4 divisors (see below), whose sum is σ = 14478883776. Its totient is φ = 12410471784.

The previous prime is 13444677767. The next prime is 13444677787. The reversal of 13444677779 is 97777644431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97777644431 = 17 ⋅5751626143.

It is a cyclic number.

It is not a de Polignac number, because 13444677779 - 2³² = 9149710483 is a prime.

It is a super-2 number, since 2×13444677779² (a number of 21 digits) contains 22 as substring.

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 (13444677479) 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, 517102979 + ... + 517103004.

It is an arithmetic number, because the mean of its divisors is an integer number (3619720944).

Almost surely, 2^13444677779 is an apocalyptic number.

13444677779 is a deficient number, since it is larger than the sum of its proper divisors (1034205997).

13444677779 is a wasteful number, since it uses less digits than its factorization.

13444677779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034205996.

The product of its digits is 24893568, while the sum is 59.

The spelling of 13444677779 in words is "thirteen billion, four hundred forty-four million, six hundred seventy-seven thousand, seven hundred seventy-nine".