650248561 has 4 divisors (see below), whose sum is σ = 666108324. Its totient is φ = 634388800.

The previous prime is 650248553. The next prime is 650248567. The reversal of 650248561 is 165842056.

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 374190336 + 276058225 = 19344^2 + 16615^2 .

It is a cyclic number.

It is not a de Polignac number, because 650248561 - 2³ = 650248553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 650248561.

It is not an unprimeable number, because it can be changed into a prime (650248567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7929820 + ... + 7929901.

It is an arithmetic number, because the mean of its divisors is an integer number (166527081).

Almost surely, 2^650248561 is an apocalyptic number.

It is an amenable number.

650248561 is a deficient number, since it is larger than the sum of its proper divisors (15859763).

650248561 is a wasteful number, since it uses less digits than its factorization.

650248561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15859762.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 650248561 is about 25499.9717842981. The cubic root of 650248561 is about 866.3495083249.

The spelling of 650248561 in words is "six hundred fifty million, two hundred forty-eight thousand, five hundred sixty-one".