54871323817 has 2 divisors, whose sum is σ = 54871323818. Its totient is φ = 54871323816.

The previous prime is 54871323791. The next prime is 54871323833. The reversal of 54871323817 is 71832317845.

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., 32326601616 + 22544722201 = 179796^2 + 150149^2 .

It is a cyclic number.

It is not a de Polignac number, because 54871323817 - 2¹⁵ = 54871291049 is a prime.

It is a super-4 number, since 4×54871323817⁴ (a number of 44 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (54871323517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27435661908 + 27435661909.

It is an arithmetic number, because the mean of its divisors is an integer number (27435661909).

Almost surely, 2^54871323817 is an apocalyptic number.

It is an amenable number.

54871323817 is a deficient number, since it is larger than the sum of its proper divisors (1).

54871323817 is an equidigital number, since it uses as much as digits as its factorization.

54871323817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 49.

The spelling of 54871323817 in words is "fifty-four billion, eight hundred seventy-one million, three hundred twenty-three thousand, eight hundred seventeen".