649359505 has 8 divisors (see below), whose sum is σ = 779608872. Its totient is φ = 519235968.

The previous prime is 649359467. The next prime is 649359577. The reversal of 649359505 is 505953946.

It can be written as a sum of positive squares in 4 ways, for example, as 35856144 + 613503361 = 5988^2 + 24769^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 649359505 - 2⁹ = 649358993 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19702 + ... + 41071.

It is an arithmetic number, because the mean of its divisors is an integer number (97451109).

Almost surely, 2^649359505 is an apocalyptic number.

It is an amenable number.

649359505 is a deficient number, since it is larger than the sum of its proper divisors (130249367).

649359505 is a wasteful number, since it uses less digits than its factorization.

649359505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62915.

The product of its (nonzero) digits is 729000, while the sum is 46.

The square root of 649359505 is about 25482.5333316764. The cubic root of 649359505 is about 865.9544878272.

The spelling of 649359505 in words is "six hundred forty-nine million, three hundred fifty-nine thousand, five hundred five".