656212631443 has 2 divisors, whose sum is σ = 656212631444. Its totient is φ = 656212631442.

The previous prime is 656212631441. The next prime is 656212631491. The reversal of 656212631443 is 344136212656.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656212631443 - 2¹ = 656212631441 is a prime.

Together with 656212631441, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 656212631443.

It is not a weakly prime, because it can be changed into another prime (656212631441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328106315721 + 328106315722.

It is an arithmetic number, because the mean of its divisors is an integer number (328106315722).

Almost surely, 2^656212631443 is an apocalyptic number.

656212631443 is a deficient number, since it is larger than the sum of its proper divisors (1).

656212631443 is an equidigital number, since it uses as much as digits as its factorization.

656212631443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 43.

The spelling of 656212631443 in words is "six hundred fifty-six billion, two hundred twelve million, six hundred thirty-one thousand, four hundred forty-three".