55638477432617 has 2 divisors, whose sum is σ = 55638477432618. Its totient is φ = 55638477432616.

The previous prime is 55638477432613. The next prime is 55638477432661. The reversal of 55638477432617 is 71623477483655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28380221181481 + 27258256251136 = 5327309^2 + 5220944^2 .

It is a cyclic number.

It is not a de Polignac number, because 55638477432617 - 2² = 55638477432613 is a prime.

It is not a weakly prime, because it can be changed into another prime (55638477432613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27819238716308 + 27819238716309.

It is an arithmetic number, because the mean of its divisors is an integer number (27819238716309).

Almost surely, 2^{55638477432617} is an apocalyptic number.

It is an amenable number.

55638477432617 is a deficient number, since it is larger than the sum of its proper divisors (1).

55638477432617 is an equidigital number, since it uses as much as digits as its factorization.

55638477432617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 711244800, while the sum is 68.

The spelling of 55638477432617 in words is "fifty-five trillion, six hundred thirty-eight billion, four hundred seventy-seven million, four hundred thirty-two thousand, six hundred seventeen".