649953205 has 48 divisors (see below), whose sum is σ = 903026880. Its totient is φ = 445280000.

The previous prime is 649953193. The next prime is 649953221. The reversal of 649953205 is 502359946.

It is not a de Polignac number, because 649953205 - 2¹⁵ = 649920437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2589330 + ... + 2589580.

It is an arithmetic number, because the mean of its divisors is an integer number (18813060).

Almost surely, 2^649953205 is an apocalyptic number.

It is an amenable number.

649953205 is a deficient number, since it is larger than the sum of its proper divisors (253073675).

649953205 is a wasteful number, since it uses less digits than its factorization.

649953205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 649953205 is about 25494.1798259917. The cubic root of 649953205 is about 866.2183173246.

The spelling of 649953205 in words is "six hundred forty-nine million, nine hundred fifty-three thousand, two hundred five".