61110555563 has 2 divisors, whose sum is σ = 61110555564. Its totient is φ = 61110555562.

The previous prime is 61110555523. The next prime is 61110555577. The reversal of 61110555563 is 36555501116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61110555563 - 2³² = 56815588267 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (61110555523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30555277781 + 30555277782.

It is an arithmetic number, because the mean of its divisors is an integer number (30555277782).

Almost surely, 2^61110555563 is an apocalyptic number.

61110555563 is a deficient number, since it is larger than the sum of its proper divisors (1).

61110555563 is an equidigital number, since it uses as much as digits as its factorization.

61110555563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67500, while the sum is 38.

The spelling of 61110555563 in words is "sixty-one billion, one hundred ten million, five hundred fifty-five thousand, five hundred sixty-three".