56540694709 has 2 divisors, whose sum is σ = 56540694710. Its totient is φ = 56540694708.

The previous prime is 56540694673. The next prime is 56540694739. The reversal of 56540694709 is 90749604565.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55059214609 + 1481480100 = 234647^2 + 38490^2 .

It is a cyclic number.

It is not a de Polignac number, because 56540694709 - 2²⁷ = 56406476981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56540694709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56540694739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28270347354 + 28270347355.

It is an arithmetic number, because the mean of its divisors is an integer number (28270347355).

Almost surely, 2^56540694709 is an apocalyptic number.

It is an amenable number.

56540694709 is a deficient number, since it is larger than the sum of its proper divisors (1).

56540694709 is an equidigital number, since it uses as much as digits as its factorization.

56540694709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 56540694709 in words is "fifty-six billion, five hundred forty million, six hundred ninety-four thousand, seven hundred nine".