656252021443 has 2 divisors, whose sum is σ = 656252021444. Its totient is φ = 656252021442.

The previous prime is 656252021437. The next prime is 656252021533. The reversal of 656252021443 is 344120252656.

It is a happy number.

656252021443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656252021443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 656252021396 and 656252021405.

It is not a weakly prime, because it can be changed into another prime (656252021143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328126010721 + 328126010722.

It is an arithmetic number, because the mean of its divisors is an integer number (328126010722).

Almost surely, 2^656252021443 is an apocalyptic number.

656252021443 is a deficient number, since it is larger than the sum of its proper divisors (1).

656252021443 is an equidigital number, since it uses as much as digits as its factorization.

656252021443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 656252021443 in words is "six hundred fifty-six billion, two hundred fifty-two million, twenty-one thousand, four hundred forty-three".