650556481 has 4 divisors (see below), whose sum is σ = 656313732. Its totient is φ = 644799232.

The previous prime is 650556451. The next prime is 650556497. The reversal of 650556481 is 184655056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 356605456 + 293951025 = 18884^2 + 17145^2 .

It is a cyclic number.

It is not a de Polignac number, because 650556481 - 2⁷ = 650556353 is a prime.

It is a super-2 number, since 2×650556481² = 846447469942206722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650556451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2878456 + ... + 2878681.

It is an arithmetic number, because the mean of its divisors is an integer number (164078433).

Almost surely, 2^650556481 is an apocalyptic number.

It is an amenable number.

650556481 is a deficient number, since it is larger than the sum of its proper divisors (5757251).

650556481 is a wasteful number, since it uses less digits than its factorization.

650556481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5757250.

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 650556481 is about 25506.0087234361. The cubic root of 650556481 is about 866.4862377026.

The spelling of 650556481 in words is "six hundred fifty million, five hundred fifty-six thousand, four hundred eighty-one".