656111506189 has 2 divisors, whose sum is σ = 656111506190. Its totient is φ = 656111506188.

The previous prime is 656111506187. The next prime is 656111506223. The reversal of 656111506189 is 981605111656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 517165216164 + 138946290025 = 719142^2 + 372755^2 .

It is a cyclic number.

It is not a de Polignac number, because 656111506189 - 2¹ = 656111506187 is a prime.

It is a super-3 number, since 3×656111506189³ (a number of 36 digits) contains 333 as substring.

Together with 656111506187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656111506187) 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 as a sum of consecutive naturals, namely, 328055753094 + 328055753095.

It is an arithmetic number, because the mean of its divisors is an integer number (328055753095).

Almost surely, 2^656111506189 is an apocalyptic number.

It is an amenable number.

656111506189 is a deficient number, since it is larger than the sum of its proper divisors (1).

656111506189 is an equidigital number, since it uses as much as digits as its factorization.

656111506189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 49.

The spelling of 656111506189 in words is "six hundred fifty-six billion, one hundred eleven million, five hundred six thousand, one hundred eighty-nine".