56540753309 has 2 divisors, whose sum is σ = 56540753310. Its totient is φ = 56540753308.

The previous prime is 56540753273. The next prime is 56540753323. The reversal of 56540753309 is 90335704565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32685024100 + 23855729209 = 180790^2 + 154453^2 .

It is a cyclic number.

It is not a de Polignac number, because 56540753309 - 2¹⁶ = 56540687773 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56540753389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28270376654 + 28270376655.

It is an arithmetic number, because the mean of its divisors is an integer number (28270376655).

Almost surely, 2^56540753309 is an apocalyptic number.

It is an amenable number.

56540753309 is a deficient number, since it is larger than the sum of its proper divisors (1).

56540753309 is an equidigital number, since it uses as much as digits as its factorization.

56540753309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701000, while the sum is 47.

The spelling of 56540753309 in words is "fifty-six billion, five hundred forty million, seven hundred fifty-three thousand, three hundred nine".