649799782 has 4 divisors (see below), whose sum is σ = 974699676. Its totient is φ = 324899890.

The previous prime is 649799771. The next prime is 649799783. The reversal of 649799782 is 287997946.

649799782 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 287997946 = 2 ⋅143998973.

It is a self number, because there is not a number n which added to its sum of digits gives 649799782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649799783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162449944 + ... + 162449947.

It is an arithmetic number, because the mean of its divisors is an integer number (243674919).

Almost surely, 2^649799782 is an apocalyptic number.

649799782 is a deficient number, since it is larger than the sum of its proper divisors (324899894).

649799782 is a wasteful number, since it uses less digits than its factorization.

649799782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324899893.

The product of its digits is 13716864, while the sum is 61.

The square root of 649799782 is about 25491.1706675076. The cubic root of 649799782 is about 866.1501543296.

The spelling of 649799782 in words is "six hundred forty-nine million, seven hundred ninety-nine thousand, seven hundred eighty-two".