650468781 has 12 divisors (see below), whose sum is σ = 989017120. Its totient is φ = 410822280.

The previous prime is 650468779. The next prime is 650468789. The reversal of 650468781 is 187864056.

It is a happy number.

650468781 is a `hidden beast` number, since 6 + 504 + 68 + 7 + 81 = 666.

It is not a de Polignac number, because 650468781 - 2¹ = 650468779 is a prime.

It is a super-2 number, since 2×650468781² = 846219270111251922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650468789) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1901785 + ... + 1902126.

Almost surely, 2^650468781 is an apocalyptic number.

It is an amenable number.

650468781 is a deficient number, since it is larger than the sum of its proper divisors (338548339).

650468781 is a wasteful number, since it uses less digits than its factorization.

650468781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3803936 (or 3803933 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 650468781 is about 25504.2894627551. The cubic root of 650468781 is about 866.4472996241.

It can be divided in two parts, 650468 and 781, that added together give a square (651249 = 807²).

The spelling of 650468781 in words is "six hundred fifty million, four hundred sixty-eight thousand, seven hundred eighty-one".