54564138557 has 2 divisors, whose sum is σ = 54564138558. Its totient is φ = 54564138556.

The previous prime is 54564138547. The next prime is 54564138581. The reversal of 54564138557 is 75583146545.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53348988676 + 1215149881 = 230974^2 + 34859^2 .

It is a cyclic number.

It is not a de Polignac number, because 54564138557 - 2¹⁶ = 54564073021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54564138499 and 54564138508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54564138547) 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, 27282069278 + 27282069279.

It is an arithmetic number, because the mean of its divisors is an integer number (27282069279).

Almost surely, 2^54564138557 is an apocalyptic number.

It is an amenable number.

54564138557 is a deficient number, since it is larger than the sum of its proper divisors (1).

54564138557 is an equidigital number, since it uses as much as digits as its factorization.

54564138557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080000, while the sum is 53.

The spelling of 54564138557 in words is "fifty-four billion, five hundred sixty-four million, one hundred thirty-eight thousand, five hundred fifty-seven".