55100510561 has 2 divisors, whose sum is σ = 55100510562. Its totient is φ = 55100510560.

The previous prime is 55100510501. The next prime is 55100510567. The reversal of 55100510561 is 16501500155.

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., 44259744400 + 10840766161 = 210380^2 + 104119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55100510561 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55100510567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27550255280 + 27550255281.

It is an arithmetic number, because the mean of its divisors is an integer number (27550255281).

Almost surely, 2^55100510561 is an apocalyptic number.

It is an amenable number.

55100510561 is a deficient number, since it is larger than the sum of its proper divisors (1).

55100510561 is an equidigital number, since it uses as much as digits as its factorization.

55100510561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 55100510561 in words is "fifty-five billion, one hundred million, five hundred ten thousand, five hundred sixty-one".