648436802 has 8 divisors (see below), whose sum is σ = 1047474876. Its totient is φ = 299278512.

The previous prime is 648436801. The next prime is 648436813. The reversal of 648436802 is 208634846.

It can be written as a sum of positive squares in 2 ways, for example, as 616975921 + 31460881 = 24839^2 + 5609^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 648436802.

It is not an unprimeable number, because it can be changed into a prime (648436801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12469913 + ... + 12469964.

Almost surely, 2^648436802 is an apocalyptic number.

648436802 is a deficient number, since it is larger than the sum of its proper divisors (399038074).

648436802 is a wasteful number, since it uses less digits than its factorization.

648436802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24939892.

The product of its (nonzero) digits is 221184, while the sum is 41.

The square root of 648436802 is about 25464.4222789365. The cubic root of 648436802 is about 865.5441360112.

The spelling of 648436802 in words is "six hundred forty-eight million, four hundred thirty-six thousand, eight hundred two".