648443541 has 16 divisors (see below), whose sum is σ = 871252928. Its totient is φ = 428976000.

The previous prime is 648443539. The next prime is 648443557. The reversal of 648443541 is 145344846.

It is not a de Polignac number, because 648443541 - 2¹ = 648443539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648443541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648443561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325350 + ... + 327336.

It is an arithmetic number, because the mean of its divisors is an integer number (54453308).

Almost surely, 2^648443541 is an apocalyptic number.

It is an amenable number.

648443541 is a deficient number, since it is larger than the sum of its proper divisors (222809387).

648443541 is a wasteful number, since it uses less digits than its factorization.

648443541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772.

The product of its digits is 184320, while the sum is 39.

The square root of 648443541 is about 25464.5546004638. The cubic root of 648443541 is about 865.5471344436.

The spelling of 648443541 in words is "six hundred forty-eight million, four hundred forty-three thousand, five hundred forty-one".