63545144549 has 4 divisors (see below), whose sum is σ = 65736356460. Its totient is φ = 61353932640.

The previous prime is 63545144539. The next prime is 63545144561. The reversal of 63545144549 is 94544154536.

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 28677051649 + 34868092900 = 169343^2 + 186730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63545144549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63545144497 and 63545144506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63545144539) 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, 1095605912 + ... + 1095605969.

It is an arithmetic number, because the mean of its divisors is an integer number (16434089115).

Almost surely, 2^63545144549 is an apocalyptic number.

It is an amenable number.

63545144549 is a deficient number, since it is larger than the sum of its proper divisors (2191211911).

63545144549 is a wasteful number, since it uses less digits than its factorization.

63545144549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191211910.

The product of its digits is 5184000, while the sum is 50.

The spelling of 63545144549 in words is "sixty-three billion, five hundred forty-five million, one hundred forty-four thousand, five hundred forty-nine".