649631195 has 24 divisors (see below), whose sum is σ = 809906688. Its totient is φ = 500206080.

The previous prime is 649631179. The next prime is 649631219. The reversal of 649631195 is 591136946.

It is not a de Polignac number, because 649631195 - 2⁴ = 649631179 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 (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1695974 + ... + 1696356.

It is an arithmetic number, because the mean of its divisors is an integer number (33746112).

Almost surely, 2^649631195 is an apocalyptic number.

649631195 is a deficient number, since it is larger than the sum of its proper divisors (160275493).

649631195 is a wasteful number, since it uses less digits than its factorization.

649631195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803 (or 772 counting only the distinct ones).

The product of its digits is 174960, while the sum is 44.

The square root of 649631195 is about 25487.8636805834. The cubic root of 649631195 is about 866.0752418770.

The spelling of 649631195 in words is "six hundred forty-nine million, six hundred thirty-one thousand, one hundred ninety-five".