60806561 has 2 divisors, whose sum is σ = 60806562. Its totient is φ = 60806560.

The previous prime is 60806539. The next prime is 60806563. The reversal of 60806561 is 16560806.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39137536 + 21669025 = 6256^2 + 4655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60806561 is a prime.

Together with 60806563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (60806563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30403280 + 30403281.

It is an arithmetic number, because the mean of its divisors is an integer number (30403281).

Almost surely, 2^60806561 is an apocalyptic number.

It is an amenable number.

60806561 is a deficient number, since it is larger than the sum of its proper divisors (1).

60806561 is an equidigital number, since it uses as much as digits as its factorization.

60806561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 60806561 is about 7797.8561797458. The cubic root of 60806561 is about 393.2331727316.

The spelling of 60806561 in words is "sixty million, eight hundred six thousand, five hundred sixty-one".