63744344669 has 4 divisors (see below), whose sum is σ = 63778091580. Its totient is φ = 63710597760.

The previous prime is 63744344663. The next prime is 63744344693. The reversal of 63744344669 is 96644344736.

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 47725645444 + 16018699225 = 218462^2 + 126565^2 .

It is a cyclic number.

It is not a de Polignac number, because 63744344669 - 2⁸ = 63744344413 is a prime.

It is a super-2 number, since 2×63744344669² (a number of 22 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 (63744344663) 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, 16870622 + ... + 16874399.

It is an arithmetic number, because the mean of its divisors is an integer number (15944522895).

Almost surely, 2^63744344669 is an apocalyptic number.

It is an amenable number.

63744344669 is a deficient number, since it is larger than the sum of its proper divisors (33746911).

63744344669 is a wasteful number, since it uses less digits than its factorization.

63744344669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33746910.

The product of its digits is 31352832, while the sum is 56.

The spelling of 63744344669 in words is "sixty-three billion, seven hundred forty-four million, three hundred forty-four thousand, six hundred sixty-nine".