55510000561 has 2 divisors, whose sum is σ = 55510000562. Its totient is φ = 55510000560.

The previous prime is 55510000517. The next prime is 55510000577. The reversal of 55510000561 is 16500001555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46455336225 + 9054664336 = 215535^2 + 95156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55510000561 is a prime.

It is not a weakly prime, because it can be changed into another prime (55510007561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27755000280 + 27755000281.

It is an arithmetic number, because the mean of its divisors is an integer number (27755000281).

Almost surely, 2^55510000561 is an apocalyptic number.

It is an amenable number.

55510000561 is a deficient number, since it is larger than the sum of its proper divisors (1).

55510000561 is an equidigital number, since it uses as much as digits as its factorization.

55510000561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 28.

The spelling of 55510000561 in words is "fifty-five billion, five hundred ten million, five hundred sixty-one", and thus it is an aban number.