647481445 has 16 divisors (see below), whose sum is σ = 840237552. Its totient is φ = 476144640.

The previous prime is 647481421. The next prime is 647481479. The reversal of 647481445 is 544184746.

It is a happy number.

647481445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 13549761 + 633931684 = 3681^2 + 25178^2 .

It is not a de Polignac number, because 647481445 - 2¹⁷ = 647350373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5002 + ... + 36331.

It is an arithmetic number, because the mean of its divisors is an integer number (52514847).

Almost surely, 2^647481445 is an apocalyptic number.

647481445 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

647481445 is a deficient number, since it is larger than the sum of its proper divisors (192756107).

647481445 is a wasteful number, since it uses less digits than its factorization.

647481445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41592.

The product of its digits is 430080, while the sum is 43.

The square root of 647481445 is about 25445.6567020779. The cubic root of 647481445 is about 865.1188516565.

The spelling of 647481445 in words is "six hundred forty-seven million, four hundred eighty-one thousand, four hundred forty-five".