54981257533 has 2 divisors, whose sum is σ = 54981257534. Its totient is φ = 54981257532.

The previous prime is 54981257519. The next prime is 54981257549. The reversal of 54981257533 is 33575218945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52949231449 + 2032026084 = 230107^2 + 45078^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54981257533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54981227533) 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, 27490628766 + 27490628767.

It is an arithmetic number, because the mean of its divisors is an integer number (27490628767).

Almost surely, 2^54981257533 is an apocalyptic number.

It is an amenable number.

54981257533 is a deficient number, since it is larger than the sum of its proper divisors (1).

54981257533 is an equidigital number, since it uses as much as digits as its factorization.

54981257533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536000, while the sum is 52.

The spelling of 54981257533 in words is "fifty-four billion, nine hundred eighty-one million, two hundred fifty-seven thousand, five hundred thirty-three".