54544145561 has 2 divisors, whose sum is σ = 54544145562. Its totient is φ = 54544145560.

The previous prime is 54544145549. The next prime is 54544145569. The reversal of 54544145561 is 16554144545.

54544145561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53026575625 + 1517569936 = 230275^2 + 38956^2 .

It is a cyclic number.

It is not a de Polignac number, because 54544145561 - 2¹⁰ = 54544144537 is a prime.

It is not a weakly prime, because it can be changed into another prime (54544145569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27272072780 + 27272072781.

It is an arithmetic number, because the mean of its divisors is an integer number (27272072781).

Almost surely, 2^54544145561 is an apocalyptic number.

It is an amenable number.

54544145561 is a deficient number, since it is larger than the sum of its proper divisors (1).

54544145561 is an equidigital number, since it uses as much as digits as its factorization.

54544145561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960000, while the sum is 44.

The spelling of 54544145561 in words is "fifty-four billion, five hundred forty-four million, one hundred forty-five thousand, five hundred sixty-one".