650650500561 has 4 divisors (see below), whose sum is σ = 867534000752. Its totient is φ = 433767000372.

The previous prime is 650650500559. The next prime is 650650500571. The reversal of 650650500561 is 165005056056.

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 not a de Polignac number, because 650650500561 - 2¹ = 650650500559 is a prime.

It is a super-2 number, since 2×650650500561² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650650500541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108441750091 + ... + 108441750096.

It is an arithmetic number, because the mean of its divisors is an integer number (216883500188).

Almost surely, 2^650650500561 is an apocalyptic number.

It is an amenable number.

650650500561 is a deficient number, since it is larger than the sum of its proper divisors (216883500191).

650650500561 is a wasteful number, since it uses less digits than its factorization.

650650500561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216883500190.

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 650650500561 in words is "six hundred fifty billion, six hundred fifty million, five hundred thousand, five hundred sixty-one".