649958785 has 24 divisors (see below), whose sum is σ = 919743336. Its totient is φ = 439568640.

The previous prime is 649958753. The next prime is 649958791. The reversal of 649958785 is 587859946.

649958785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 151954929 + 498003856 = 12327^2 + 22316^2 .

It is not a de Polignac number, because 649958785 - 2⁵ = 649958753 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 286 + ... + 36055.

It is an arithmetic number, because the mean of its divisors is an integer number (38322639).

Almost surely, 2^649958785 is an apocalyptic number.

It is an amenable number.

649958785 is a deficient number, since it is larger than the sum of its proper divisors (269784551).

649958785 is a wasteful number, since it uses less digits than its factorization.

649958785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36433 (or 36426 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 61.

The square root of 649958785 is about 25494.2892624996. The cubic root of 649958785 is about 866.2207962130.

The spelling of 649958785 in words is "six hundred forty-nine million, nine hundred fifty-eight thousand, seven hundred eighty-five".