648526825 has 6 divisors (see below), whose sum is σ = 804173294. Its totient is φ = 518821440.

The previous prime is 648526819. The next prime is 648526843. The reversal of 648526825 is 528625846.

It can be written as a sum of positive squares in 3 ways, for example, as 203148009 + 445378816 = 14253^2 + 21104^2 .

It is not a de Polignac number, because 648526825 - 2⁵ = 648526793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12970512 + ... + 12970561.

Almost surely, 2^648526825 is an apocalyptic number.

It is an amenable number.

648526825 is a deficient number, since it is larger than the sum of its proper divisors (155646469).

648526825 is a wasteful number, since it uses less digits than its factorization.

648526825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25941083 (or 25941078 counting only the distinct ones).

The product of its digits is 921600, while the sum is 46.

The square root of 648526825 is about 25466.1898406495. The cubic root of 648526825 is about 865.5841888860.

The spelling of 648526825 in words is "six hundred forty-eight million, five hundred twenty-six thousand, eight hundred twenty-five".