13244681577 has 4 divisors (see below), whose sum is σ = 17659575440. Its totient is φ = 8829787716.

The previous prime is 13244681551. The next prime is 13244681587. The reversal of 13244681577 is 77518644231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13244681577 - 2²⁰ = 13243633001 is a prime.

It is a super-4 number, since 4×13244681577⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13244681587) 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, 2207446927 + ... + 2207446932.

It is an arithmetic number, because the mean of its divisors is an integer number (4414893860).

Almost surely, 2^13244681577 is an apocalyptic number.

It is an amenable number.

13244681577 is a deficient number, since it is larger than the sum of its proper divisors (4414893863).

13244681577 is an equidigital number, since it uses as much as digits as its factorization.

13244681577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414893862.

The product of its digits is 1128960, while the sum is 48.

The spelling of 13244681577 in words is "thirteen billion, two hundred forty-four million, six hundred eighty-one thousand, five hundred seventy-seven".