56736728069573 has 2 divisors, whose sum is σ = 56736728069574. Its totient is φ = 56736728069572.

The previous prime is 56736728069561. The next prime is 56736728069639. The reversal of 56736728069573 is 37596082763765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28547403222529 + 28189324847044 = 5342977^2 + 5309362^2 .

It is a cyclic number.

It is not a de Polignac number, because 56736728069573 - 2¹⁸ = 56736727807429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56736728069573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56736728069503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28368364034786 + 28368364034787.

It is an arithmetic number, because the mean of its divisors is an integer number (28368364034787).

Almost surely, 2^{56736728069573} is an apocalyptic number.

It is an amenable number.

56736728069573 is a deficient number, since it is larger than the sum of its proper divisors (1).

56736728069573 is an equidigital number, since it uses as much as digits as its factorization.

56736728069573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400451200, while the sum is 74.

The spelling of 56736728069573 in words is "fifty-six trillion, seven hundred thirty-six billion, seven hundred twenty-eight million, sixty-nine thousand, five hundred seventy-three".