649556 has 6 divisors (see below), whose sum is σ = 1136730. Its totient is φ = 324776.

The previous prime is 649541. The next prime is 649559. The reversal of 649556 is 655946.

It is a happy number.

649556 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 only one way, i.e., 512656 + 136900 = 716^2 + 370^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649559) by changing a digit.

649556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81191 + ... + 81198.

It is an arithmetic number, because the mean of its divisors is an integer number (189455).

2⁶⁴⁹⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

649556 is a deficient number, since it is larger than the sum of its proper divisors (487174).

649556 is a wasteful number, since it uses less digits than its factorization.

649556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162393 (or 162391 counting only the distinct ones).

The product of its digits is 32400, while the sum is 35.

The square root of 649556 is about 805.9503706805. The cubic root of 649556 is about 86.6041824434.

The spelling of 649556 in words is "six hundred forty-nine thousand, five hundred fifty-six".