54942857989 has 2 divisors, whose sum is σ = 54942857990. Its totient is φ = 54942857988.

The previous prime is 54942857947. The next prime is 54942858023. The reversal of 54942857989 is 98975824945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54308573764 + 634284225 = 233042^2 + 25185^2 .

It is a cyclic number.

It is not a de Polignac number, because 54942857989 - 2⁹ = 54942857477 is a prime.

It is a super-2 number, since 2×54942857989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54942857689) 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, 27471428994 + 27471428995.

It is an arithmetic number, because the mean of its divisors is an integer number (27471428995).

Almost surely, 2^54942857989 is an apocalyptic number.

It is an amenable number.

54942857989 is a deficient number, since it is larger than the sum of its proper divisors (1).

54942857989 is an equidigital number, since it uses as much as digits as its factorization.

54942857989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 261273600, while the sum is 70.

The spelling of 54942857989 in words is "fifty-four billion, nine hundred forty-two million, eight hundred fifty-seven thousand, nine hundred eighty-nine".