56745564389 has 2 divisors, whose sum is σ = 56745564390. Its totient is φ = 56745564388.

The previous prime is 56745564361. The next prime is 56745564527. The reversal of 56745564389 is 98346554765.

56745564389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52180264900 + 4565299489 = 228430^2 + 67567^2 .

It is a cyclic number.

It is not a de Polignac number, because 56745564389 - 2⁸ = 56745564133 is a prime.

It is a super-2 number, since 2×56745564389² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56745524389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28372782194 + 28372782195.

It is an arithmetic number, because the mean of its divisors is an integer number (28372782195).

Almost surely, 2^56745564389 is an apocalyptic number.

It is an amenable number.

56745564389 is a deficient number, since it is larger than the sum of its proper divisors (1).

56745564389 is an equidigital number, since it uses as much as digits as its factorization.

56745564389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864000, while the sum is 62.

The spelling of 56745564389 in words is "fifty-six billion, seven hundred forty-five million, five hundred sixty-four thousand, three hundred eighty-nine".