108661482781 has 2 divisors, whose sum is σ = 108661482782. Its totient is φ = 108661482780.

The previous prime is 108661482767. The next prime is 108661482791. The reversal of 108661482781 is 187284166801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88902963556 + 19758519225 = 298166^2 + 140565^2 .

It is an emirp because it is prime and its reverse (187284166801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108661482781 - 2¹⁵ = 108661450013 is a prime.

It is a super-2 number, since 2×108661482781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108661482701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54330741390 + 54330741391.

It is an arithmetic number, because the mean of its divisors is an integer number (54330741391).

Almost surely, 2^108661482781 is an apocalyptic number.

It is an amenable number.

108661482781 is a deficient number, since it is larger than the sum of its proper divisors (1).

108661482781 is an equidigital number, since it uses as much as digits as its factorization.

108661482781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1032192, while the sum is 52.

The spelling of 108661482781 in words is "one hundred eight billion, six hundred sixty-one million, four hundred eighty-two thousand, seven hundred eighty-one".