650240561 has 4 divisors (see below), whose sum is σ = 659945712. Its totient is φ = 640535412.

The previous prime is 650240557. The next prime is 650240573. The reversal of 650240561 is 165042056.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 650240561 - 2² = 650240557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (650240501) 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, 4852475 + ... + 4852608.

It is an arithmetic number, because the mean of its divisors is an integer number (164986428).

Almost surely, 2^650240561 is an apocalyptic number.

It is an amenable number.

650240561 is a deficient number, since it is larger than the sum of its proper divisors (9705151).

650240561 is an equidigital number, since it uses as much as digits as its factorization.

650240561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9705150.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 650240561 is about 25499.8149208970. The cubic root of 650240561 is about 866.3459554145.

The spelling of 650240561 in words is "six hundred fifty million, two hundred forty thousand, five hundred sixty-one".