54861346160809 has 2 divisors, whose sum is σ = 54861346160810. Its totient is φ = 54861346160808.

The previous prime is 54861346160671. The next prime is 54861346160843. The reversal of 54861346160809 is 90806164316845.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50808384000000 + 4052962160809 = 7128000^2 + 2013197^2 .

It is a cyclic number.

It is not a de Polignac number, because 54861346160809 - 2¹⁵ = 54861346128041 is a prime.

It is a super-2 number, since 2×54861346160809² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (54861346160009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27430673080404 + 27430673080405.

It is an arithmetic number, because the mean of its divisors is an integer number (27430673080405).

Almost surely, 2^{54861346160809} is an apocalyptic number.

It is an amenable number.

54861346160809 is a deficient number, since it is larger than the sum of its proper divisors (1).

54861346160809 is an equidigital number, since it uses as much as digits as its factorization.

54861346160809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29859840, while the sum is 61.

The spelling of 54861346160809 in words is "fifty-four trillion, eight hundred sixty-one billion, three hundred forty-six million, one hundred sixty thousand, eight hundred nine".