108186478657 has 2 divisors, whose sum is σ = 108186478658. Its totient is φ = 108186478656.

The previous prime is 108186478651. The next prime is 108186478681. The reversal of 108186478657 is 756874681801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105203571201 + 2982907456 = 324351^2 + 54616^2 .

It is a cyclic number.

It is not a de Polignac number, because 108186478657 - 2²³ = 108178090049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 108186478595 and 108186478604.

It is not a weakly prime, because it can be changed into another prime (108186478651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54093239328 + 54093239329.

It is an arithmetic number, because the mean of its divisors is an integer number (54093239329).

Almost surely, 2^108186478657 is an apocalyptic number.

It is an amenable number.

108186478657 is a deficient number, since it is larger than the sum of its proper divisors (1).

108186478657 is an equidigital number, since it uses as much as digits as its factorization.

108186478657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18063360, while the sum is 61.

The spelling of 108186478657 in words is "one hundred eight billion, one hundred eighty-six million, four hundred seventy-eight thousand, six hundred fifty-seven".