54756564509 has 2 divisors, whose sum is σ = 54756564510. Its totient is φ = 54756564508.

The previous prime is 54756564497. The next prime is 54756564523. The reversal of 54756564509 is 90546565745.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39659527609 + 15097036900 = 199147^2 + 122870^2 .

It is a cyclic number.

It is not a de Polignac number, because 54756564509 - 2²⁴ = 54739787293 is a prime.

It is a super-2 number, since 2×54756564509² (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 (54756564529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27378282254 + 27378282255.

It is an arithmetic number, because the mean of its divisors is an integer number (27378282255).

Almost surely, 2^54756564509 is an apocalyptic number.

It is an amenable number.

54756564509 is a deficient number, since it is larger than the sum of its proper divisors (1).

54756564509 is an equidigital number, since it uses as much as digits as its factorization.

54756564509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680000, while the sum is 56.

The spelling of 54756564509 in words is "fifty-four billion, seven hundred fifty-six million, five hundred sixty-four thousand, five hundred nine".