56540761489 has 2 divisors, whose sum is σ = 56540761490. Its totient is φ = 56540761488.

The previous prime is 56540761481. The next prime is 56540761531. The reversal of 56540761489 is 98416704565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56540755089 + 6400 = 237783^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 56540761489 - 2³ = 56540761481 is a prime.

It is not a weakly prime, because it can be changed into another prime (56540761481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28270380744 + 28270380745.

It is an arithmetic number, because the mean of its divisors is an integer number (28270380745).

Almost surely, 2^56540761489 is an apocalyptic number.

It is an amenable number.

56540761489 is a deficient number, since it is larger than the sum of its proper divisors (1).

56540761489 is an equidigital number, since it uses as much as digits as its factorization.

56540761489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7257600, while the sum is 55.

It can be divided in two parts, 5654076 and 1489, that added together give a palindrome (5655565).

The spelling of 56540761489 in words is "fifty-six billion, five hundred forty million, seven hundred sixty-one thousand, four hundred eighty-nine".