649204775 has 24 divisors (see below), whose sum is σ = 834221904. Its totient is φ = 500774400.

The previous prime is 649204757. The next prime is 649204793. The reversal of 649204775 is 577402946.

It is an interprime number because it is at equal distance from previous prime (649204757) and next prime (649204793).

It is not a de Polignac number, because 649204775 - 2⁸ = 649204519 is a prime.

It is a Duffinian number.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 101420 + ... + 107630.

It is an arithmetic number, because the mean of its divisors is an integer number (34759246).

Almost surely, 2^649204775 is an apocalyptic number.

649204775 is a deficient number, since it is larger than the sum of its proper divisors (185017129).

649204775 is a wasteful number, since it uses less digits than its factorization.

649204775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6371 (or 6366 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The square root of 649204775 is about 25479.4971496692. The cubic root of 649204775 is about 865.8857022106.

The spelling of 649204775 in words is "six hundred forty-nine million, two hundred four thousand, seven hundred seventy-five".