656345011 has 4 divisors (see below), whose sum is σ = 750108592. Its totient is φ = 562581432.

The previous prime is 656345009. The next prime is 656345021. The reversal of 656345011 is 110543656.

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

It is not a de Polignac number, because 656345011 - 2¹ = 656345009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656345021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46881780 + ... + 46881793.

It is an arithmetic number, because the mean of its divisors is an integer number (187527148).

Almost surely, 2^656345011 is an apocalyptic number.

656345011 is a deficient number, since it is larger than the sum of its proper divisors (93763581).

656345011 is an equidigital number, since it uses as much as digits as its factorization.

656345011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93763580.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 656345011 is about 25619.2312726202. The cubic root of 656345011 is about 869.0485970731.

Adding to 656345011 its reverse (110543656), we get a palindrome (766888667).

The spelling of 656345011 in words is "six hundred fifty-six million, three hundred forty-five thousand, eleven".