63445649 has 8 divisors (see below), whose sum is σ = 69494760. Its totient is φ = 57654016.

The previous prime is 63445621. The next prime is 63445651. The reversal of 63445649 is 94654436.

It can be written as a sum of positive squares in 4 ways, for example, as 37761025 + 25684624 = 6145^2 + 5068^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63445649 - 2¹⁶ = 63380113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63445619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63854 + ... + 64839.

It is an arithmetic number, because the mean of its divisors is an integer number (8686845).

Almost surely, 2^63445649 is an apocalyptic number.

It is an amenable number.

63445649 is a deficient number, since it is larger than the sum of its proper divisors (6049111).

63445649 is a wasteful number, since it uses less digits than its factorization.

63445649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128739.

The product of its digits is 311040, while the sum is 41.

The square root of 63445649 is about 7965.2777101618. The cubic root of 63445649 is about 398.8417514714.

The spelling of 63445649 in words is "sixty-three million, four hundred forty-five thousand, six hundred forty-nine".