655461641 has 2 divisors, whose sum is σ = 655461642. Its totient is φ = 655461640.

The previous prime is 655461637. The next prime is 655461643. The reversal of 655461641 is 146164556.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 339333241 + 316128400 = 18421^2 + 17780^2 .

It is a cyclic number.

It is not a de Polignac number, because 655461641 - 2² = 655461637 is a prime.

Together with 655461643, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 655461595 and 655461604.

It is not a weakly prime, because it can be changed into another prime (655461643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327730820 + 327730821.

It is an arithmetic number, because the mean of its divisors is an integer number (327730821).

Almost surely, 2^655461641 is an apocalyptic number.

It is an amenable number.

655461641 is a deficient number, since it is larger than the sum of its proper divisors (1).

655461641 is an equidigital number, since it uses as much as digits as its factorization.

655461641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 38.

The square root of 655461641 is about 25601.9850988161. The cubic root of 655461641 is about 868.6585399567.

The spelling of 655461641 in words is "six hundred fifty-five million, four hundred sixty-one thousand, six hundred forty-one".