13744544477 has 4 divisors (see below), whose sum is σ = 13768365756. Its totient is φ = 13720723200.

The previous prime is 13744544459. The next prime is 13744544507. The reversal of 13744544477 is 77444544731.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9843417796 + 3901126681 = 99214^2 + 62459^2 .

It is a cyclic number.

It is not a de Polignac number, because 13744544477 - 2⁸ = 13744544221 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 (13744544777) 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, 11909774 + ... + 11910927.

It is an arithmetic number, because the mean of its divisors is an integer number (3442091439).

Almost surely, 2^13744544477 is an apocalyptic number.

It is an amenable number.

13744544477 is a deficient number, since it is larger than the sum of its proper divisors (23821279).

13744544477 is an equidigital number, since it uses as much as digits as its factorization.

13744544477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23821278.

The product of its digits is 5268480, while the sum is 50.

The spelling of 13744544477 in words is "thirteen billion, seven hundred forty-four million, five hundred forty-four thousand, four hundred seventy-seven".