8109142370851 has 4 divisors (see below), whose sum is σ = 8328308380912. Its totient is φ = 7889976360792.

The previous prime is 8109142370827. The next prime is 8109142370887. The reversal of 8109142370851 is 1580732419018.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8109142370851 - 2²¹ = 8109140273699 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8109142370795 and 8109142370804.

It is not an unprimeable number, because it can be changed into a prime (8109142371851) 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 in 3 ways as a sum of consecutive naturals, for example, 109583004975 + ... + 109583005048.

It is an arithmetic number, because the mean of its divisors is an integer number (2082077095228).

Almost surely, 2^{8109142370851} is an apocalyptic number.

8109142370851 is a deficient number, since it is larger than the sum of its proper divisors (219166010061).

8109142370851 is a wasteful number, since it uses less digits than its factorization.

8109142370851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219166010060.

The product of its (nonzero) digits is 483840, while the sum is 49.

Adding to 8109142370851 its reverse (1580732419018), we get a palindrome (9689874789869).

The spelling of 8109142370851 in words is "eight trillion, one hundred nine billion, one hundred forty-two million, three hundred seventy thousand, eight hundred fifty-one".