55645397317 has 2 divisors, whose sum is σ = 55645397318. Its totient is φ = 55645397316.

The previous prime is 55645397273. The next prime is 55645397363. The reversal of 55645397317 is 71379354655.

55645397317 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., 52691366116 + 2954031201 = 229546^2 + 54351^2 .

It is a cyclic number.

It is not a de Polignac number, because 55645397317 - 2⁷ = 55645397189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55645391317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27822698658 + 27822698659.

It is an arithmetic number, because the mean of its divisors is an integer number (27822698659).

Almost surely, 2^55645397317 is an apocalyptic number.

It is an amenable number.

55645397317 is a deficient number, since it is larger than the sum of its proper divisors (1).

55645397317 is an equidigital number, since it uses as much as digits as its factorization.

55645397317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11907000, while the sum is 55.

The spelling of 55645397317 in words is "fifty-five billion, six hundred forty-five million, three hundred ninety-seven thousand, three hundred seventeen".