54137305561 has 2 divisors, whose sum is σ = 54137305562. Its totient is φ = 54137305560.

The previous prime is 54137305559. The next prime is 54137305633. The reversal of 54137305561 is 16550373145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48303248400 + 5834057161 = 219780^2 + 76381^2 .

It is a cyclic number.

It is not a de Polignac number, because 54137305561 - 2¹ = 54137305559 is a prime.

Together with 54137305559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (54137305961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27068652780 + 27068652781.

It is an arithmetic number, because the mean of its divisors is an integer number (27068652781).

Almost surely, 2^54137305561 is an apocalyptic number.

It is an amenable number.

54137305561 is a deficient number, since it is larger than the sum of its proper divisors (1).

54137305561 is an equidigital number, since it uses as much as digits as its factorization.

54137305561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 40.

The spelling of 54137305561 in words is "fifty-four billion, one hundred thirty-seven million, three hundred five thousand, five hundred sixty-one".