650156561 has 4 divisors (see below), whose sum is σ = 655276032. Its totient is φ = 645037092.

The previous prime is 650156527. The next prime is 650156567. The reversal of 650156561 is 165651056.

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 650156561 - 2¹⁰ = 650155537 is a prime.

It is a super-2 number, since 2×650156561² = 845407107622693442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (650156567) 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, 2559545 + ... + 2559798.

It is an arithmetic number, because the mean of its divisors is an integer number (163819008).

Almost surely, 2^650156561 is an apocalyptic number.

It is an amenable number.

650156561 is a deficient number, since it is larger than the sum of its proper divisors (5119471).

650156561 is a wasteful number, since it uses less digits than its factorization.

650156561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5119470.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 650156561 is about 25498.1677969222. The cubic root of 650156561 is about 866.3086480965.

The spelling of 650156561 in words is "six hundred fifty million, one hundred fifty-six thousand, five hundred sixty-one".