655616447 has 2 divisors, whose sum is σ = 655616448. Its totient is φ = 655616446.

The previous prime is 655616417. The next prime is 655616461. The reversal of 655616447 is 744616556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655616447 - 2⁶ = 655616383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 655616398 and 655616407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655616417) 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, 327808223 + 327808224.

It is an arithmetic number, because the mean of its divisors is an integer number (327808224).

Almost surely, 2^655616447 is an apocalyptic number.

655616447 is a deficient number, since it is larger than the sum of its proper divisors (1).

655616447 is an equidigital number, since it uses as much as digits as its factorization.

655616447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 44.

The square root of 655616447 is about 25605.0082405767. The cubic root of 655616447 is about 868.7269207540.

The spelling of 655616447 in words is "six hundred fifty-five million, six hundred sixteen thousand, four hundred forty-seven".