56036394389 has 2 divisors, whose sum is σ = 56036394390. Its totient is φ = 56036394388.

The previous prime is 56036394377. The next prime is 56036394391. The reversal of 56036394389 is 98349363065.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54519915025 + 1516479364 = 233495^2 + 38942^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56036394389 is a prime.

It is a super-2 number, since 2×56036394389² (a number of 22 digits) contains 22 as substring.

Together with 56036394391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56036394889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28018197194 + 28018197195.

It is an arithmetic number, because the mean of its divisors is an integer number (28018197195).

Almost surely, 2^56036394389 is an apocalyptic number.

It is an amenable number.

56036394389 is a deficient number, since it is larger than the sum of its proper divisors (1).

56036394389 is an equidigital number, since it uses as much as digits as its factorization.

56036394389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12597120, while the sum is 56.

The spelling of 56036394389 in words is "fifty-six billion, thirty-six million, three hundred ninety-four thousand, three hundred eighty-nine".