4451661544 has 32 divisors (see below), whose sum is σ = 9584920800. Its totient is φ = 1916982720.

The previous prime is 4451661521. The next prime is 4451661547.

It is a happy number.

4451661544 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 4451661497 and 4451661506.

It is not an unprimeable number, because it can be changed into a prime (4451661547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1329567 + ... + 1332910.

It is an arithmetic number, because the mean of its divisors is an integer number (299528775).

Almost surely, 2^4451661544 is an apocalyptic number.

4451661544 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

4451661544 is an abundant number, since it is smaller than the sum of its proper divisors (5133259256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4451661544 is a wasteful number, since it uses less digits than its factorization.

4451661544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662513 (or 2662509 counting only the distinct ones).

The product of its digits is 230400, while the sum is 40.

The square root of 4451661544 is about 66720.7729571533. The cubic root of 4451661544 is about 1645.0308465128.

The spelling of 4451661544 in words is "four billion, four hundred fifty-one million, six hundred sixty-one thousand, five hundred forty-four".