656612543 has 2 divisors, whose sum is σ = 656612544. Its totient is φ = 656612542.

The previous prime is 656612527. The next prime is 656612557. The reversal of 656612543 is 345216656.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 656612543 - 2⁴ = 656612527 is a prime.

It is a super-2 number, since 2×656612543² = 862280063249853698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 656612497 and 656612506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656612503) 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, 328306271 + 328306272.

It is an arithmetic number, because the mean of its divisors is an integer number (328306272).

Almost surely, 2^656612543 is an apocalyptic number.

656612543 is a deficient number, since it is larger than the sum of its proper divisors (1).

656612543 is an equidigital number, since it uses as much as digits as its factorization.

656612543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 38.

The square root of 656612543 is about 25624.4520526781. The cubic root of 656612543 is about 869.1666583179.

The spelling of 656612543 in words is "six hundred fifty-six million, six hundred twelve thousand, five hundred forty-three".