108406957861 has 2 divisors, whose sum is σ = 108406957862. Its totient is φ = 108406957860.

The previous prime is 108406957819. The next prime is 108406957903. The reversal of 108406957861 is 168759604801.

It is a balanced prime because it is at equal distance from previous prime (108406957819) and next prime (108406957903).

It can be written as a sum of positive squares in only one way, i.e., 102195941761 + 6211016100 = 319681^2 + 78810^2 .

It is a cyclic number.

It is not a de Polignac number, because 108406957861 - 2²¹ = 108404860709 is a prime.

It is a super-4 number, since 4×108406957861⁴ (a number of 45 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108406957801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54203478930 + 54203478931.

It is an arithmetic number, because the mean of its divisors is an integer number (54203478931).

Almost surely, 2^108406957861 is an apocalyptic number.

It is an amenable number.

108406957861 is a deficient number, since it is larger than the sum of its proper divisors (1).

108406957861 is an equidigital number, since it uses as much as digits as its factorization.

108406957861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 108406957861 in words is "one hundred eight billion, four hundred six million, nine hundred fifty-seven thousand, eight hundred sixty-one".