55616070217 has 2 divisors, whose sum is σ = 55616070218. Its totient is φ = 55616070216.

The previous prime is 55616070157. The next prime is 55616070239. The reversal of 55616070217 is 71207061655.

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., 53844417936 + 1771652281 = 232044^2 + 42091^2 .

It is a cyclic number.

It is not a de Polignac number, because 55616070217 - 2²³ = 55607681609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55616070217.

It is not a weakly prime, because it can be changed into another prime (55616070817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27808035108 + 27808035109.

It is an arithmetic number, because the mean of its divisors is an integer number (27808035109).

Almost surely, 2^55616070217 is an apocalyptic number.

It is an amenable number.

55616070217 is a deficient number, since it is larger than the sum of its proper divisors (1).

55616070217 is an equidigital number, since it uses as much as digits as its factorization.

55616070217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 55616070217 in words is "fifty-five billion, six hundred sixteen million, seventy thousand, two hundred seventeen".