75555563 has 2 divisors, whose sum is σ = 75555564. Its totient is φ = 75555562.

The previous prime is 75555551. The next prime is 75555569. The reversal of 75555563 is 36555557.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75555563 - 2⁸ = 75555307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75555563.

It is not a weakly prime, because it can be changed into another prime (75555569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37777781 + 37777782.

It is an arithmetic number, because the mean of its divisors is an integer number (37777782).

Almost surely, 2^75555563 is an apocalyptic number.

75555563 is a deficient number, since it is larger than the sum of its proper divisors (1).

75555563 is an equidigital number, since it uses as much as digits as its factorization.

75555563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 393750, while the sum is 41.

The square root of 75555563 is about 8692.2703018256. The cubic root of 75555563 is about 422.7550609103.

The spelling of 75555563 in words is "seventy-five million, five hundred fifty-five thousand, five hundred sixty-three".