108641831509 has 2 divisors, whose sum is σ = 108641831510. Its totient is φ = 108641831508.

The previous prime is 108641831497. The next prime is 108641831569. The reversal of 108641831509 is 905138146801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108094973284 + 546858225 = 328778^2 + 23385^2 .

It is a cyclic number.

It is not a de Polignac number, because 108641831509 - 2²³ = 108633442901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108641831569) 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, 54320915754 + 54320915755.

It is an arithmetic number, because the mean of its divisors is an integer number (54320915755).

Almost surely, 2^108641831509 is an apocalyptic number.

It is an amenable number.

108641831509 is a deficient number, since it is larger than the sum of its proper divisors (1).

108641831509 is an equidigital number, since it uses as much as digits as its factorization.

108641831509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 108641831509 in words is "one hundred eight billion, six hundred forty-one million, eight hundred thirty-one thousand, five hundred nine".