648446145 has 8 divisors (see below), whose sum is σ = 1037513856. Its totient is φ = 345837936.

The previous prime is 648446143. The next prime is 648446173. The reversal of 648446145 is 541644846.

It is a happy number.

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

It is not a de Polignac number, because 648446145 - 2¹ = 648446143 is a prime.

It is a super-2 number, since 2×648446145² = 840964805930722050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 648446097 and 648446106.

It is not an unprimeable number, because it can be changed into a prime (648446143) 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, 21614857 + ... + 21614886.

It is an arithmetic number, because the mean of its divisors is an integer number (129689232).

Almost surely, 2^648446145 is an apocalyptic number.

It is an amenable number.

648446145 is a deficient number, since it is larger than the sum of its proper divisors (389067711).

648446145 is a wasteful number, since it uses less digits than its factorization.

648446145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43229751.

The product of its digits is 368640, while the sum is 42.

The square root of 648446145 is about 25464.6057303073. The cubic root of 648446145 is about 865.5482930547.

The spelling of 648446145 in words is "six hundred forty-eight million, four hundred forty-six thousand, one hundred forty-five".